Liquid Extraction Of Coating Constituent Or Cleaning Coating Patents (Class 427/352)
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Patent number: 6139915Abstract: A method for contacting at least one semiconductor wafer with a chemical solution. The method includes providing a support member constructed to support at least one semiconductor wafer in a desired orientation. The method further includes orienting the support member relative to a container holding a chemical solution such that at least a portion of each semiconductor wafer that is supported by the support member is contacted by the chemical solution within the container.Type: GrantFiled: May 29, 1998Date of Patent: October 31, 2000Assignee: Micron Technology, Inc.Inventor: Frank E. Martini
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Patent number: 6121412Abstract: The present invention provides a method for producing a film forming, fractionated novolak resin, by:a) condensing formaldehyde with one or more phenolic compounds, and thereby producing a novolak resin;b) adding a photoresist solvent, and optionally a water-soluble organic polar solvent;c) feeding the mixture into a liquid/liquid centrifuge and feeding a C.sub.5 -C.sub.8 alkane, water or aromatic hydrocarbon solvent into the liquid/liquid centrifuge at a ratio of optional water-soluble organic polar solvent and photoresist solvent to C.sub.5 -C.sub.8 alkane, water or aromatic solvent, of from 5:1 to 0.5:1;d) rotating the liquid/liquid centrifuge containing the mixture at a speed of at least 500 rpm and thereby separating the mixture into two phases, collecting the two phases;e) optionally separating the lighter phase (L) into two second phases;f) removing residual C.sub.5 -C.sub.Type: GrantFiled: October 14, 1999Date of Patent: September 19, 2000Assignee: Clariant Finance (BVI) LimitedInventors: Stanley F. Wanat, M. Dalil Rahman, John J. Kokoszka, Balaji Narasimhan
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Patent number: 6112908Abstract: This invention presents novel membrane laminate structures useful for osmotic distillation, and methods for their preparation.Type: GrantFiled: February 11, 1998Date of Patent: September 5, 2000Assignee: Rentiers Machinery Pty, Ltd.Inventor: Alan Sherman Michaels
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Patent number: 6114044Abstract: A method of fabricating a micromachine includes the step of constructing a low surface energy film on the micromachine. The micromachine is then rinsed with a rinse liquid that has a high surface energy, relative to the low surface energy film, to produce a contact angle of greater than 90.degree. between the low surface energy film and the rinse liquid. This relatively large contact angle causes any rinse liquid on the micromachine to be displaced from the micromachine when the micromachine is removed from the rinse liquid. In other words, the micromachine is dried by dewetting from a liquid-based process. Thus, a separate evaporative drying step is not required, as the micromachine is removed from the liquid-based process in a dry state. The relatively large contact angle also operates to prevent attractive capillary forces between micromachine components, thereby preventing contact and adhesion between adjacent microstructure surfaces.Type: GrantFiled: May 30, 1997Date of Patent: September 5, 2000Assignee: Regents of the University of CaliforniaInventors: Michael R. Houston, Roger T. Howe, Roya Maboudian, Uthara Srinivasan
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Patent number: 6099704Abstract: This invention covers a cathodic element free from asbestos fibres that can be obtained by deposition after filtration through a porous medium of an aqueous suspension comprising electrically conductive fibres, at least one cationic polymer, at least one electocatalytic agent, at least one pore-forming agent and at least one binder selected from among the fluoropolymers. The invention also covers a method for preparing such a cathodic element.Type: GrantFiled: October 6, 1998Date of Patent: August 8, 2000Assignee: ChloralpInventors: Gerard Bacquet, Frederic Kuntzburger
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Patent number: 6093455Abstract: A method for decorating a vitreous article, in particular, a glass substrate, comprising applying to the glass in a predetermined design a radiation curable ink composition which is (i) operable when cured to bond to glass, and (ii) strippable from the glass upon exposure to alkali, and curing the ink on the glass by exposing it to the radiation by which it is curable, thereby bonding the ink to the glass; and related compositions; as well as a method for stripping the decorative indicia from glass upon exposure to alkali, and the related compositions.Type: GrantFiled: June 3, 1997Date of Patent: July 25, 2000Assignee: Deco Patents, Inc.Inventors: Melvin Edwin Kamen, Ming Hu
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Patent number: 6086764Abstract: A process for the preparation of semipermeable membranes with improved acid and base stability including: (a) coating a base and acid stable ultrafiltration (UF) membrane support polymer, with a high molecular weight amphoteric polyelectrolyte coating polymer optionally in solution, the amphoteric polyelectrolyte containing both cationic and anionic groups and in addition primary and secondary amine groups, the solution optionally containing a latent internal crosslinker compound that is a polyfunctional compound that crosslinks the coating polymer only during a curing step at elevated temperatures and basic pH; (b) draining or washing the coated support; and (c) reacting the coating with a solution of an external crosslinking compound that is a polyfuntional compound, not overly reactive so as not to be hydrolyzed prematurely in solution, the time of exposure to the external crosslinking compound being sufficient to ensure its diffusion into the bulk of the coating, so that the crosslinking is effected not oType: GrantFiled: June 10, 1998Date of Patent: July 11, 2000Assignee: Crosswinds, Inc.Inventors: Charles Linder, Mara Nemes, Reuven Ketraro
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Method for manufacturing a chemically adsorbed film and a chemical adsorbent solution for the method
Patent number: 6060123Abstract: The methods of forming a chemically adsorbed film by contacting a substrate with a solution mixture containing an alkoxysilane surface active agent, a non-aqueous solvent and a silanol-condensing catalyst to form a film covalently bonded to the substrate via siloxane bonds. These methods do not generate hydrochloric acid gas in forming the films and allow practical reaction rates.Type: GrantFiled: July 20, 1998Date of Patent: May 9, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Kazufumi Ogawa -
Patent number: 6017583Abstract: In a process for the manufacture of a strip material (1) a plastics layer (5, 6) is formed at least on one side of a support (2) from a mixture of plastics materials and particulate soluble corpuscles wherein the soluble corpuscles are leachable by a solvent of a type against which the plastics material is stable. Thereafter the soluble corpuscles are leached out from the plastics layer (5, 6) with the formation of throughflow passages. According to the invention, a plastics powder is prepared as the plastics material, which is mixed with the soluble corpuscles and applied onto the support (2). By heat and pressure treatment a plastics layer (5, 6) including therein the soluble particles, is produced from the mixture of plastics powder and soluble corpuscles, prior to the soluble corpuscles being leached at least in part out of the plastics layer (5, 6).Type: GrantFiled: September 24, 1997Date of Patent: January 25, 2000Assignee: Conrad Munzinger & Cie AGInventor: Michael Gass
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Patent number: 6013331Abstract: A chemically adsorbed film is formed on a substrate surface as a coating film, in which film-composing molecules are inclined in a preferable direction and are bonded and fixed to the substrate surface in a predetermined single direction and at one end. A coating film with excellent anti-abrasion properties is provided by adding the same type of a crosslinking agent as a chemical adsorbent in a chemical adsorption solution in film-forming processes, and then by crosslinking adsorbed molecules. 5 wt. % of CF.sub.3 (CF.sub.2).sub.7 (CH.sub.2).sub.2 SiCl.sub.3 (chemical adsorbent), 3 wt. % of hexachlorodisiloxane (crosslinking agent), and 92 wt. % of cyclohexane (nonaqueous solvent; bp. 80.degree. C.) are mixed so as to prepare a chemical adsorption solution. The solution is coated on an aluminum substrate in a dry atmosphere, and the solvent is evaporated and removed from the substrate.Type: GrantFiled: August 25, 1997Date of Patent: January 11, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Kazufumi Ogawa
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Patent number: 5965201Abstract: The properties of cement matrices are improved by one or more of the three processes which can be performed individually, sequentially, or in any desired combination. In each instance a supercritical fluid including at least one substance other than CO.sub.2 is flowed through the matrix and the matrix is contacted by the substance to change, e.g. react, constituents of the two with each other. Alternatively, the supercritical fluid can be used as a solvent, itself or by combining it with a solvent which itself may or may not be supercritical, and the fluid is infused into the matrix to carry into the matrix and there deposit the dissolved material. This step can be repeated with another supercritical fluid which has a reactant for the material dissolved so that, upon the infusion of the second supercritical fluid, the initially deposited material and the reactant react to provide the matrix with desired characteristics.Type: GrantFiled: May 19, 1997Date of Patent: October 12, 1999Assignee: Materials Technology LimitedInventor: Roger H. Jones, Jr.
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Patent number: 5952050Abstract: A method for dispensing a chemical, such as an edge bead removal solvent, onto a semiconductor wafer comprising the steps of dispensing the chemical selectively onto the wafer and applying a suction to the area immediately surrounding the location at which the chemical is dispensed onto the wafer. Preferably, the suction is applied simultaneously with the dispensing of the chemical. One specific version of the invention provides an edge bead removal system wherein suction is applied to the area immediately surrounding the solvent dispensing nozzle to remove dissolved coating material and excess solvent from the wafer. In one aspect of this system, an apparatus for removing the edge bead includes a mechanism for dispensing a solvent selectively onto the edge of the wafer, and a mechanism surrounding the dispensing mechanism for vacuuming excess solvent and dissolved coating material from the edge of the wafer.Type: GrantFiled: October 6, 1997Date of Patent: September 14, 1999Assignee: Micron Technology, Inc.Inventor: Trung T. Doan
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Patent number: 5948476Abstract: A method for forming a molecular film includes the steps of: coating a surface of a substrate having active hydrogen atoms on its surface with a coating solution containing a silane-based compound having at least one reactive group selected from the group consisting of a chloro group, an alkoxy group and an isocyanate group; and effecting an elimination reaction between the active hydrogen atoms on the surface of the substrate and reactive groups of the silane-based compound, thereby covalently bonding the silane-based compounds to the surface of the substrate. The substrate is supplied to a chamber in which an atmosphere is maintained at a low water vapor density. The surface of the substrate is coated with a coating solution containing the silane-based compound and a solvent by using a transfer element. A dehydrochlorination reaction is effected between the active hydrogen atoms and the chloro groups of the silane-based compounds.Type: GrantFiled: November 4, 1997Date of Patent: September 7, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tadashi Otake, Norihisa Mino, Tohru Nakagawa, Mamoru Soga, Kazufumi Ogawa, Takaiki Nomura, Yasuo Takebe
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Patent number: 5945170Abstract: The use of selected cation exchange resins to remove dissolved multivalent cations ions such as iron, zinc, and chromium from used autodeposition compositions permits reuse of the autodeposition compositions without the need for added surfactant and without developing any undesirable graininess or other texture in the coatings formed. Iminodiacetate cation exchange resins are very effective for removing iron ions when they are the only multivalent ions to be removed, and can be efficiently regenerated with 0.5 to 4% by weight aqueous hydrofluoric acid. By proper choice of other cation exchange resins and operating conditions, zinc can be selectively extracted from autodeposition baths containing both iron and zinc, and either iron or zinc can be selectively displaced from the loaded ion exchange resin.Type: GrantFiled: November 17, 1997Date of Patent: August 31, 1999Assignee: Henkel CorporationInventors: William G. Kozak, Christina M. Haas, Bashir M. Ahmed
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Patent number: 5942286Abstract: The present invention provides a method for selectively allowing film-forming molecules to be chemically adsorbed onto an Si substrate to produce a good and robust organic monomolecular film, wherein molecules with SH groups are chemically adsorbed onto the Si substrate to form a monomolecular film of the molecules by heating an As molecular beam source 4 to allow a monoatomic layer thickness of arsenic to be adsorbed onto the clean surface of the Si substrate set on a sample stage 3 and then immersing the Si substrate terminated by arsenic in a solution containing molecules with SH groups.Type: GrantFiled: October 18, 1996Date of Patent: August 24, 1999Assignees: Agency of Industrial Science and Technology, Angstrom Technology Partnership, Sharp CorporationInventors: Hirotaka Ohno, Shangjr Gwo, Hiroshi Tokumoto
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Patent number: 5939208Abstract: In the present invention method, the surface of articles made of acrylic polymers and methacrylic polymers are converted into thin biomimetic layers by using the process involving at least the following two steps:(a) The polymer surface is contacted, in the presence of water and for a predetermined reaction time necessary to form a continuous surface layer thinner than about 500 microns, with a solution containing one or more tetraalkylammonium hydroxides of the general formula:R.sub.1 R.sub.2 R.sub.3 R.sub.4 N.sup.+ OH.sup.-where R.sub.1, R.sub.2, R.sub.3, R.sub.4 are the alkyl substituents, in which the sum of the number of carbon atoms is equal to or larger than 8 but smaller than 45; and,(b) The article is removed from the aqueous reaction solution and excess of tetraalkylammonium hydroxide is removed from the polymer surface by washing the polymer with a liquid miscible with the tetraalkylammonium hydroxide.Type: GrantFiled: November 7, 1997Date of Patent: August 17, 1999Assignee: Biomimetics, Inc.Inventor: Patrick Stoy
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Patent number: 5935646Abstract: A process for producing a molecular sieve silica membrane comprising depositing a hybrid organic-inorganic polymer comprising at least one organic constituent and at least one inorganic constituent on a porous substrate material and removing at least a portion of the at least one organic constituent of the hybrid organic-inorganic polymer, forming a porous film.Type: GrantFiled: January 26, 1998Date of Patent: August 10, 1999Assignees: Gas Research Institute, Sandia National LaboratoriesInventors: Narayan K. Raman, Charles Jeffrey Brinker
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Patent number: 5932494Abstract: A textile material for use as a support for coagulation is disclosed. The textile material consists of a warp including of from 8 to 10 polyester yarns per centimeter and a weft including of from 12 to 16 cotton yarns per centimeter. The coagulated product obtainable through coagulation of polyurethane resins on the support is also disclosed.Type: GrantFiled: April 14, 1998Date of Patent: August 3, 1999Inventor: Andrea Crippa
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Patent number: 5925417Abstract: A treatment process for metal in which there is applied to a metal surface a film of an organic product, the film is heated to a suitable temperature for a suitable time so that all or a portion of the product becomes fixed on the metal surface and the organic product becomes partly cross-linked on the surface. Applications to corrosion protection, to lubrication and to preparation for coating, especially varnishing sheets.Type: GrantFiled: April 28, 1997Date of Patent: July 20, 1999Assignee: SollacInventor: Daniel Fousse
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Patent number: 5897918Abstract: A faster and more efficient method for applying ultra thin films to substrate surfaces is disclosed. The method comprises heating a film forming composition comprising amphiphilic molecules to a liquid state, immersing the substrate surface in the heated liquid composition to heat the surface, and washing away the excess composition. For surfaces that ordinarily have insufficient or no chemical moieties reactive with the amphiphilic molecules, the immersion in the heated composition causes the substrate to become porous and expose previously unavailable chemically reactive moieties in the surface matrix. The amphiphilic molecules then self-assemble, chemically bond to the surface matrix and self-polymerize with each other and with other surface matrix-bound and/or surface-bound molecules to form the ultra thin surface film. The method is also faster and more efficient for coating non porous and metal surfaces.Type: GrantFiled: December 17, 1997Date of Patent: April 27, 1999Assignee: nanoFilm, Ltd.Inventors: Brij P. Singh, Pramod K. Arora
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Patent number: 5876801Abstract: A chemically adsorbed film having a surface layer containing fluorine groups and a stem layer chemically bonded by siloxane bonds to a substrate is formed on the surface of a frictional portion of a machine part such as a gear or a bearing or on the surface of a game ball. An excellently self-lubricating low frictional resistance machine part or game ball thus can be obtained. A frictional portion of a gear or the like, made of SiO.sub.2 or like ceramic material, is dipped and held in a solution containing a surface active material, e.g., CF.sub.3 (CF.sub.2).sub.7 (CH.sub.2).sub.2 SiCl.sub.3 dissolved in a non-aqueous solvent. A hydrochloric acid removal reaction is brought about between SiCl groups of the material, which contains a fluorocarbon and a chlorosilane group, and hydroxyl groups numerously present on the SiO2 surface, thus forming bonds ofCF.sub.3 (CF.sub.2).sub.7 (CH.sub.2).sub.2 Si (O--).sub.3over the entire frictional portion surface.Type: GrantFiled: September 23, 1997Date of Patent: March 2, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazufumi Ogawa, Norihisa Mino, Mamoru Soga
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Patent number: 5871815Abstract: An antistatic film comprising a chemically adsorbed film of straight chain molecules each containing a conductive group and provided on a chargeable substrate via covalent bonds each containing a Si group, said chemically adsorbed film having a conductivity of 10.sup.-10 S/cm or above. With the antistatic chemically adsorbed film according to the invention, conductive functional groups are secured via chemically adsorbed molecules and by siloxane bonds to the surface of a substrate material such as ceramics, glass, synthetic resins or synthetic fibers, a film, a plate, an display screen surface, a light-emitting tube. Thus, the film provides an antistatic effect and does not separate. In addition, this chemically adsorbed film has a thickness at the nanometer level and is thus excellently transparent, as well as capable of preventing contamination of the substrate surface due to charging thereof. The film is also excellently durable.Type: GrantFiled: July 14, 1997Date of Patent: February 16, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazufumi Ogawa, Norihisa Mino, Mamoru Soga
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Patent number: 5789522Abstract: The invention is directed to purification of phenolic resins and to a process for preparing an organic photoresist coating composition. The process comprises reacting one or more phenols to form a crude phenolic resin. The crude phenolic resin formed is then separated from its reaction mixture and dissolved in an aqueous insoluble organic solvent in an organic solvent that is a solvent for the photoresist coating composition. The solution so formed is then mixed with an aqueous phase to extract water soluble impurities from the resin solution into the aqueous phase. Finally, the purified resin solution is further diluted with additional photoresist solvent.Type: GrantFiled: September 6, 1996Date of Patent: August 4, 1998Assignee: Shipley Company, L.L.C.Inventors: Anthony Zampini, Suzanne M. Coley
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Patent number: 5786030Abstract: A reaction rinse containing strong alkali, betaine surfactants, and a complexing agent for iron enhances the gloss of a dried and cured autodeposited coating that is contacted with the reaction rinse while still wet, particularly if the autodeposited coating consists predominantly of a copolymer of vinylidene chloride.Type: GrantFiled: November 12, 1996Date of Patent: July 28, 1998Assignee: Henkel CorporationInventors: Bashir M. Ahmed, Douglas A. Brown, William E. Fristad
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Patent number: 5782961Abstract: The invention relates to a method of treating structures of mineral materials, particularly concrete structures, with hydrophobizing substances in the form of silanes and/or siloxanes which are applied to the surfaces of the structures and absorbed therein by capillary action. The hydrophobizing substances may be applied as a thick layer in the form of a gel-like mass of essentially solvent-free silanes and/or siloxanes together with a vehicle medium of a layer-lattice mineral, such as bentonite or montmorillonite. Vehicle medium residues are removed when the hydrophobizing substance has been absorbed into the treated structures.Type: GrantFiled: September 20, 1996Date of Patent: July 21, 1998Inventor: Ernst Folke Jean Karlsson
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Patent number: 5780105Abstract: A method for coating a semiconductor wafer with a high-viscosity photoresist that requires a seven-phase coating process which uses a large diameter dispenser nozzle is disclosed. In this first phase, the photoresist is dispensed onto a slow rotating wafer. In the second phase, this slow rotation phase is continued for a short time after the photoresist is dispensed. In the third phase, the wafer rotational speed is increased to a second value for a short duration. In the fourth phase, the rotational speed is again increased to a third high value for a long duration. In the fifth phase, the rotational speed is decreased to a fourth value and the backside of the wafer is rinsed for a short time period to remove any photoresist that may have migrated to the backside. In the sixth phase, the wafer is rotated at the fourth speed value for another short time period. Finally, the rotation of the wafer is stopped for about a second before being removed from the photoresist coating system.Type: GrantFiled: July 31, 1997Date of Patent: July 14, 1998Assignee: Vanguard International Semiconductor CorporationInventor: Li-Ming Wang
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Patent number: 5770275Abstract: A process for producing a molecular sieve silica membrane comprising depositing a hybrid organic-inorganic polymer comprising at least one organic constituent and at least one inorganic constituent on a porous substrate material and removing at least a portion of the at least one organic constituent of the hybrid organic-inorganic polymer, forming a porous film.Type: GrantFiled: August 23, 1996Date of Patent: June 23, 1998Inventors: Narayan K. Raman, Charles Jeffrey Brinker
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Patent number: 5756146Abstract: Copper lines or molybdenum lines on a substrate are inspected for defects by coating a metallized substrate with an inspection layer followed by imaging the substrate, and removing the inspection layer after the imaging. The inspection layer can be a light reflecting metal or a combination of a light reflecting metal and light-absorbing organic compound.Type: GrantFiled: March 12, 1997Date of Patent: May 26, 1998Assignee: International Business Machines CorporationInventors: Kang-Wook Lee, Alfred Viehbeck
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Patent number: 5736220Abstract: A synthetic reinforcement having surface features that facilitate adhesion of the reinforcement to another surface and a process for making the same is disclosed. The synthetic reinforcement is comprised of a plurality of continuous fibers that are maintained in position by a resin encasement. An external surface of the synthetic reinforcement can be characterized by micro-recesses that are located in a generally random pattern, which increases the surface area of the resin encasement.Type: GrantFiled: October 8, 1996Date of Patent: April 7, 1998Inventor: Daniel A. Tingley
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Patent number: 5733603Abstract: A method for coating the surface of a substrate composed of a hydrophobic polymer with a hydrophobic vinyl polymer. The method includes preparing a solution of the hydrophobic vinyl polymer in a polar nonaqueous solvent, such as 1-methyl-1-pyrrolidinone, in which the hydrophobic vinyl polymer is surface-active. The substrate then is treated with the solution under conditions sufficient to deposit the hydrophobic vinyl polymer on the substrate. The hydrophobic vinyl polymer may have readily hydrolyzable pendant groups which, upon hydrolysis thereof in an aqueous medium, will result in the formation of a hydrophilic vinyl polymer coating on the substrate. For example, the hydrophobic vinyl polymer may be poly(vinyl trifluoroacetate). Also provided are coated substrates, in which the substrate is a shaped article composed of a hydrophobic polymer. The shaped article may be, for example, a film, fiber, or nonwoven web.Type: GrantFiled: June 5, 1996Date of Patent: March 31, 1998Assignee: Kimberly-Clark CorporationInventors: Leonid Anthony Turkevich, David Lewis Myers, Gunilla Elsa Gillberg-LaForce
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Patent number: 5731041Abstract: The invention is to a method for producing a high surface substrate. A mask is positioned (31) over a substrate to define a deposition area. Thereafter at least two dissimilar materials are simultaneously deposited (32) through the mask onto the deposition area. Then one of the deposited materials is selectively removed (33) to provide a high surface area deposited substrate.Type: GrantFiled: September 11, 1996Date of Patent: March 24, 1998Assignee: Texas Instruments IncorporatedInventors: Donald C. Abbott, Mohendra S. Bawa
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Patent number: 5723183Abstract: The invention is the chemical composition and method for forming a chemical conversion coating on ferrous metal surfaces and subsequent coloring of said conversion coating through the application of a water-soluble dye. The conversion coating has an ordered crystalline structure composed of ferrous oxalate or other ferrous dicarboxylates. The conversion coating can be colored through the application of a water-soluble reactive dye which bonds with Fe (II) within the ferrous dicarboxylate matrix, bound to the dicarboxylate molecules, thereby becoming water insoluble and permanent. When sealed with an appropriate rust preventive top coat, the result is an attractive and protective finish of minimal thickness which can be applied through simple immersion process techniques. Said finish can serve as a final protective finish on a fabricated ferrous metal article and also affords a degree of lubricity for assembly, break-in purposes, or anti-galling protection and serves as an adhesive base for paint.Type: GrantFiled: September 16, 1996Date of Patent: March 3, 1998Assignee: Birchwood Laboratories, Inc.Inventors: Richard K. Williams, David J. Halverson, James N. Tuttle, Jr.
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Patent number: 5679400Abstract: A method for making an intravascular stent by applying to the body of a stent a solution which includes a solvent, a polymer dissolved in the solvent and a therapeutic substance dispersed in the solvent and then evaporating the solvent. The inclusion of a polymer in intimate contact with a drug on the stent allows the drug to be retained on the stent during expansion of the stent and also controls the administration of drug following implantation. The adhesion of the coating and the rate at which the drug is delivered can be controlled by the selection of an appropriate bioabsorbable or biostable polymer and the ratio of drug to polymer in the solution. By this method, drugs such as dexamethasone can be applied to a stent, retained on a stent during expansion of the stent and elute at a controlled rate.Type: GrantFiled: June 7, 1995Date of Patent: October 21, 1997Assignee: Medtronic, Inc.Inventor: Ronald J. Tuch
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Patent number: 5626905Abstract: Process for the preparation of an asbestos-free microporous electroconductive substrate. The process includes (a) providing an aqueous suspension of a mixture of carbon or graphite fibers, polytetrafluoroethylene fibers, inert mineral fibers, at least one fluorinated polymer, a silica porogen, and, optionally, at least one thickening agent; (b) depositing a coating onto a porous support by programmedly vacuum filtering said suspension therethrough, the coating comprising a liquid medium; (c) removing the liquid medium from said coating and then drying same; (d) sintering the coating thus formed; and (e) extracting the silica porogen therefrom. A substrate including intimate admixture of carbon or graphite fibers, polytetrafluoroethylene fibers and inert mineral fibers, and optionally, at least one thickening agent, consolidated by a binding amount of at least one fluorinated polymer is formed. The substrate produced is well suited for the electrolysis of solutions of, e.g., alkali metal halides.Type: GrantFiled: May 31, 1995Date of Patent: May 6, 1997Assignee: Rhone-Poulenc ChimieInventors: Jean Bachot, Frederic Kuntzburger
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Patent number: 5601762Abstract: The invention relates to strings for stringed musical instruments, fishing equipment, and sports racquets which are exposed to a suitable solvent or suitable elasticizer compatible with the materials contained in the fibers, bonding resins, or coating resins in the strings, such that partial dissolution of the material in the suitable solvent occurs or absorption of the suitable elasticizer occurs so as to increase the elasticity, increase the flexibility, increase the ductility, or increase the resiliency of the strings.Type: GrantFiled: December 14, 1993Date of Patent: February 11, 1997Assignee: Ferrari Importing CompanyInventors: Harry M. Ferrari, Ronald H. Carr
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Patent number: 5595790Abstract: An effective non-specular reflector, for use in a Liquid Crystal Display, is formed by first coating a substrate with a two component solution. One component hardens when heated or when exposed to ultraviolet light (optionally through a mask) while the other component remains liquid. The result is a solid layer in which are dispersed multiple liquid regions, some of which break the surface where they are easily removed, leaving behind a roughened surface. Once a high reflectance metal has been deposited onto this surface it becomes an effective nonspecular reflector. Examples of materials for use as the two components are given.Type: GrantFiled: June 21, 1996Date of Patent: January 21, 1997Assignee: Industrial Technology Research InstituteInventor: Chung-Kuang Wei
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Patent number: 5591482Abstract: A method of manufacturing a conductive polyurethane foam in which the polymerization is made easy, the refinement of pyrrole or the like is not required, the recovery rate of a solvent is enhanced, and the pre-treatment is not required at all; and a conductive polyurethane foam having excellent performances. This method includes a process: of coating an oxidizer solution (methanol solution containing FeCl.sub.3 and FeCl.sub.Type: GrantFiled: February 17, 1994Date of Patent: January 7, 1997Assignee: Inoac CorporationInventors: Fei-feng He, Toshihiro Yamamoto, Miwako Yamamoto
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Patent number: 5580605Abstract: At least one monomolecule film is formed on a transparent substrate surface directly or via a protective film. The monomolecule film is formed with chemical coupling of chlorosilane surface active compound, for example, of the formula:F(CF.sub.2).sub.m (CH.sub.2).sub.n SiR.sub.q X.sub.3-qwhere m is an integer of from 1 to 15, n is an integer of from 0 to 15 provided that the total of m and n is an integer of from 10 to 30 and R is an alkyl or an alkoxyl group, orF(CF.sub.2).sub.m' (CH.sub.2).sub.n' A(CH.sub.2).sub.p SiR.sub.q X.sub.3-qwhere m' represents an integer ranging from 1 to 8, n' represents an integer ranging from 0 to 2, p represents an integer ranging from 5 to 25, q represents an integer ranging from 0 to 2, X represents a halogen atom or an alkoxyl group, R represents an alkyl or an alkoxyl group, and A represents --O--, a --COO-- or --Si(CH.sub.3).sub.2 --. The transparent substrate such as glass is made hydrophobic and free of contamination.Type: GrantFiled: May 1, 1995Date of Patent: December 3, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazufumi Ogawa, Norihisa Mino, Mamoru Soga
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Patent number: 5578340Abstract: A medical member having active hydrogen groups such as hydroxyl, amino or imino groups at its surface, is dipped, either directly or after formation of an inner layer on its surface, into a solution. The solution is prepared by dissolving a surface active material, e.g., CF.sub.3 (CF.sub.2).sub.7 (CH.sub.2).sub.2 SiCl.sub.3 in a non-aqueous solvent. A dehydrochlorination reaction is brought about between active hydrogen groups at the surface of the member and SiCl groups of the surface active material, thus producing bonds ofCF.sub.3 (CF.sub.2).sub.7 (CH.sub.2).sub.2 Si(O--).sub.3over the entire surface. A fluorine-containing monomolecular film is formed, which is chemically (or covalently) bonded to the member surface and has a thickness at the nanometer level. Since the chemically adsorbed film is covalently bonded to the member or inner layer, it is chemically stable and difficult to separate.Type: GrantFiled: June 7, 1995Date of Patent: November 26, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazufumi Ogawa, Norihisa Mino, Mamoru Soga
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Patent number: 5573815Abstract: Polymeric ledges on a metal stencil screen are made using a polymeric layer which is partially removed by a developer solution.Type: GrantFiled: May 30, 1995Date of Patent: November 12, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: Allan Cairncross, Chester A. Thayer, II
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Patent number: 5569427Abstract: A process for producing a low porosity, high temperature coating on a porous substrate based on ceramic fibers of refractory compounds. The coating comprises from 30.8 to 41.9 weight % of silica (SiO.sub.2) from a silica sol, from 30.2 to 49.4 weight % of alumina (Al.sub.2 O.sub.3), from 4.0 to 16.3 weight % of silicon carbide (SiC), and from 11.6 to 16.6 weight % of molybdenum disilicide (MoSi.sub.2). The coating has an emissivity of not less than 0.8 and an operating temperature of up to 1500.degree. C. The process is carried out without a firing step and includes the steps of preparing a slurry comprising from 65 to 75 weight % of a silica sol having a content of 20 to 50 weight % of SiO.sub.2 and from 25 to 35 weight % of a mixture of particles of the refractory compounds Al.sub.2 O.sub.3, SiC, and MoSi.sub.Type: GrantFiled: March 16, 1995Date of Patent: October 29, 1996Assignees: Aerospatiale Societe Nationale Industrielle, VIAM - All Russian Institut of Aviation MaterialsInventors: Elena V. Semenova, Vladimir M. Tjurin, Stanislav S. Solntsev, Alexei Y. Bersenev
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Patent number: 5561215Abstract: A method for removing cured sulfur-containing polymer sealants from surfaces is disclosed. The method comprises applying to the surface a sealant remover comprising at least about 50 wt. % of a pyrrolidone, especially N-methyl-2-pyrrolidone, and allowing the cured sulfur-containing polymer and the remover to remain in contact until the cured sulfur-containing polymer is loosened and can be easily removed from the surface. The method of the invention enables fast, effective removal of the sulfur-containing polymer sealants commonly used in the aerospace, construction, and insulating-glass industries.Type: GrantFiled: August 31, 1994Date of Patent: October 1, 1996Assignee: Arco Chemical Technology, L.P.Inventor: Daniel B. Pourreau
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Patent number: 5518767Abstract: A molecular self-assembly process based on the alternating deposition of a p-type doped electrically conductive polycationic polymer and a conjugated or nonconjugated polyanion has been developed. In this process, monolayers of electrically conductive polymers are spontaneously adsorbed onto a substrate from dilute solutions and subsequently built-up into multilayer thin films by alternating deposition with a soluble polyanion. In contrast to a deposition process involving the alternate self-assembly of polycations and polyanions, this process is driven by the electrostatic attractions developed between the p-type doped conducting polymer and the polyanion. The net positive charge of the conducting polymer can be systematically adjusted by simply varying its doping level.Type: GrantFiled: July 1, 1993Date of Patent: May 21, 1996Assignee: Massachusetts Institute of TechnologyInventors: Michael F. Rubner, Josephine H. Cheung
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Patent number: 5500250Abstract: Disclosed is an ornament with a thin film formed on the ornament surface. The thin film includes a fluorocarbon-based adsorbed monomolecular film, and the thin film is covalently bonded to the ornament. By contacting the ornament with the non-aqueous solution containing a chlorosilane group at one end and a fluorocarbon chain at the other end, a reaction occurs between hydroxyl groups at the ornament surface and the chlorosilyl groups of the material having a plurality of chlorosilyl grounds. A monomolecular film which is covalently bonded to the ornament surface is thereby obtained. A thin, fluorine-containing, monomolecular film thus can be formed on the ornament such that it is, chemically bonded to the ornament. The film is anti-contaminating, water-and oil-repelling, durable and does not spoil the intrinsic luster of the ornament.Type: GrantFiled: August 7, 1995Date of Patent: March 19, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazufumi Ogawa, Norihisa Mino, Mamoru Soga
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Patent number: 5498460Abstract: A synthetic reinforcement having a plurality of recesses on a surface to facilitate adhesion to wood structural members and a process for making the same is disclosed. The synthetic reinforcement is comprised of a plurality of continuous fibers that are maintained in position by a resin encasement. The surface of the synthetic reinforcement is characterized by recesses that are located in a generally random pattern, which increases the surface area of the resin encasement. The synthetic reinforcement is connectable to wood laminae or itself with commercial grade adhesives such as the resorcinol resins, which are suitable for adhering the wood laminae together.Type: GrantFiled: September 16, 1994Date of Patent: March 12, 1996Inventor: Daniel A. Tingley
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Patent number: 5466486Abstract: The invention to provide a chemically adsorbed monomolecular lamination film comprising a chemically adsorbed monomolecular film formed via a siloxane-based monomolecular or polymer film on a substrate surface.Type: GrantFiled: September 30, 1994Date of Patent: November 14, 1995Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazufumi Ogawa, Norihisa Mino, Mamoru Soga
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Patent number: 5466487Abstract: A chemically adsorbed monomolecular or a laminated monomolecular film comprising a monomolecular film formed on said substrate surface by covalent S-bonds is disclosed. For example, the covalent S-bond is selected of a group consisting of --(S.dbd.O)-- and --(O.dbd.S.dbd.O)--. A method of producing a chemical adsorption film comprising; contacting a substrate containing hydroxl groups present on the surface with a non-aqueous solvent containing a material having a thionyl halide group or sulfuryl haloride group; removing unreacted surface active material remaining on the substrate by washing the substrate with a non-aqueous organic solution for making monomolecular a precursor film; reacting unreacted surface active material remaining on the adsorbed monomolecular precursor film with water; and drying the adsorbed monomolecular film is also disclosed.Type: GrantFiled: September 30, 1994Date of Patent: November 14, 1995Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tadashi Ohtake, Norihisa Mino, Kazufumi Ogawa
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Patent number: 5458905Abstract: About 0.01% to 10% of an antifoam silicone oil having a predetermined viscosity of at least about 100 cp is dispersed in an aqueous solution of a water-soluble gum having a viscosity within about 20% of the predetermined viscosity of the silicone oil. A substrate is contacted with the dispersion so as to form a dispersion-wetted substrate and at least a part of the aqueous solution is removed from the substrate, wherein the silicone oil remains in the substrate.Type: GrantFiled: June 28, 1993Date of Patent: October 17, 1995Assignee: Lydall, Inc.Inventor: David G. Heagle
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Patent number: 5437894Abstract: A water- and oil-repelling adsorbing film formed on a material having active hydrogen such as hydroxyl group, imino group and amino group at the surface. This film is a chemically adsorbed film having surface irregularities exceeding 10 nanometers. It is directly or indirectly covalently bonded to the material surface and includes a monomolecular film or a polymer film with the molecules thereof containing a fluorocarbon group and a --Si-- bond. The surface irregularities which exceed the molecular level are at least either those formed on the material surface itself, those due to particles formed on the substrate surface or those due to particles present in the chemically adsorbed film.Type: GrantFiled: January 25, 1994Date of Patent: August 1, 1995Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazufumi Ogawa, Mamoru Soga
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Patent number: 5424098Abstract: A method of manufacturing an organic film comprises dipping and holding a substrate having an active hydrogen atom on its surface in a metallic compound having an electrophilic property or solution of the metallic compound and washing the substrate with a nonaqueous solvent, thereby manufacturing a metallic monomolecular film on the substrate surface, or dipping and holding a substrate having an organic monomolecular film in organic compound or acid anhydride of organic compound or solution dissolving the organic solution, thereby, manufacturing an organic monomolecular film on a metallic compound monomolecular film. According to the method of manufacturing an organic film above mentioned, unlike the Langmuir-Blodgett technique, a complicated operation is not required and contamination of impurity to inside of film is avoided. As a result, a film having a complicated structure can be manufactured on a substrate simply.Type: GrantFiled: September 20, 1993Date of Patent: June 13, 1995Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazuhiro Nishiyama, Norihisa Mino, Kazufumi Ogawa