Patents Examined by Sadie L. Childs
  • Method for forming silicon oxide films
    Patent number: 4518630
    Abstract: Method for forming silicon oxide layers on silicon surfaces with at least two oxidation steps, in which a first step (B.sub.1) is performed at a low oxidation temperature (T.sub.1) in an atmosphere containing a mixture of oxygen and hydrogen chloride with a low hydrogen chloride concentration, and in which a second step (B.sub.3) is performed at a high oxidation temperature (T.sub.2), characterized by the feature that the second step (B.sub.3) is performed in a dry oxygen atmosphere. An intermediate step (B.sub.2) may also be employed for heating from the low temperature to the high temperature.
    Type: Grant
    Filed: February 10, 1983
    Date of Patent: May 21, 1985
    Assignee: Siemens AG
    Inventor: Leo Grasser
  • Polymeric film coating method with continuous deposition pressure control
    Patent number: 4518623
    Abstract: Method and apparatus are disclosed for coating substrates with a film polymer based on p-xylylene by vapor-phase polymerization. The apparatus monitors the monomer vapor pressure after pyrolization of the cyclic di-p-xylylene dimer, compares the measured pressure to a predetermined pressure needed to effect a completed vapor-phase polymerization reaction, and adjusts the temperature of vaporization in response to variations between measured pressure and the predetermined pressure.
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: May 21, 1985
    Inventor: Thomas J. Riley
  • Vaporous amine catalyst spray method of applying a film to a substrate
    Patent number: 4517222
    Abstract: Disclosed is a novel method for applying a film of a coating composition in liquid form onto a substrate which applied film cures rapidly at room temperature without heat curing. The coating composition comprises a hydroxyl-functional compound (preferably bearing aromatic-hydroxyl groups) and a multi-isocyanate cross-linking agent, optionally dispersed in a fugitive organic solvent therefor. The method comprises the steps of:(a) concurrently generating an atomizate of said coating composition and a carrier gas bearing a catalytic amount of a vaporous tertiary amine;(b) mixing said atomizate and said vaporous catalytic amine-bearing carrier gas flow; and(c) directing said mixture of step (b) onto said substrate to form said applied film.
    Type: Grant
    Filed: May 30, 1984
    Date of Patent: May 14, 1985
    Assignee: Ashland Oil, Inc.
    Inventor: James R. Blegen
  • Coated surfaces capable of decomposing oils
    Patent number: 4515862
    Abstract: The present invention provides a coated metal substrate useful for decomposing cooking residues, e.g. oils through a gasification cracking reaction by providing a specific catalytic surface. The catalyst is at least one of Group 1A or 2A oxides or compounds of the formula (MA).sub.x (MB).sub.y (O).sub.z whereMA: element of Group 1A or 2AMB: element of Group 3A or 4AO: Oxygenx, y, z: integersaid catalyst being the sole effective catalyst for decomposing oils and being present in an amount sufficient to effect such decomposition and an inorganic binder, a hardening agent, and a pigment.
    Type: Grant
    Filed: March 5, 1984
    Date of Patent: May 7, 1985
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masao Maki, Yasunori Kaneko, Ikuo Kobayashi
  • Coating uniformity improvement apparatus
    Patent number: 4513683
    Abstract: Apparatus for improving the uniformity of a wet coating applied on a charge-retaining base material, said apparatus comprising charging means for producing an electric field between said coating and said base material while said coating remains in an essentially wet state.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: April 30, 1985
    Assignee: Polaroid Corporation
    Inventor: Semyon Kisler
  • Apparatus for guiding gas for LP CVD processes in a tube reactor
    Patent number: 4509456
    Abstract: An apparatus for guiding gas through a tube reactor in low pressure chemical vapor deposition processes. The apparatus includes the tube reactor, a substrate mounting element in the interior of the tube reactor, to receive substrates in a generally parallel position with respect to each other along the substrate mounting element, a cup-shaped inner tube surrounding the substrate mounting element, a gas feed arranged within the inner tube, a gas discharge opening arranged in the inner tube at a point opposite to the gas feed, and an intermediate zone between the tube reactor and the inner tube. Preferably, the inner tube is eccentrically disposed within the tube reactor, to increase the size of the intermediate zone in the area of the gas discharge opening, thus facilitating passage of exhaust gas out of the inner tube. Typically, the substrate mounting can be rotated.
    Type: Grant
    Filed: June 18, 1982
    Date of Patent: April 9, 1985
    Assignee: VEB Zentrum fur Forschung und Technologie Mikroelektronik
    Inventors: Michael Kleinert, Rainer Moller, Horst Stelzer
  • Method for the production of homogeneous coatings of two or more metals and/or metal compounds
    Patent number: 4510182
    Abstract: A method for the production of homogeneous coatings of a substance comprising at least two metals and/or metal compounds on a substrate, which method comprises depositing the substance from a gas or liquid phase from dinuclear or polynuclear mixed metal compounds via a four step process comprising heating the substance to 85-90% of a final temperature over a period of 5 to 20 minutes, reducing the temperature to a second temperature which is 2/3 of said final temperature, maintaining the second temperature for 11/2 to 21/2 hours, raising the second temperature over a period of 20 to 40 minutes, and maintaining the final temperature for 1 to 2 hours. The coated materials are, for example, useful for coating solar collectors with an .alpha. of at least 0.70 and an .epsilon. no greater than 0.30.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: April 9, 1985
    Assignees: Ruhrchemie Aktiengesellschaft, Maschinenfabrik Augsburg-Nurnberg
    Inventors: Boy Cornils, Bela Tihanyi, Jurgen Weber, Werner DeWin, Edwin Erben, August Muhlratzer
  • Coating by atomization of high (i.e., about 70-99% by weight) solids film-forming compositions
    Patent number: 4505957
    Abstract: High solids coating methods and apparatus are disclosed which eliminate many of the disadvantages associated with known coating processes. The techniques disclosed require only a minor amount of a volatile solvent to achieve atomization and application of a paint or other coating material. High solids coating compositions containing about 70-99% by weight solids are atomized and coated. This method also enables polymeric compositions having high molecular weight to be employed as coating materials. According to techniques described, liquid compositions containing film-forming solids are kept under pressure with a minor amount of a highly volatile solvent of from about 1 to 30% by weight, even as low as about 1-10% by weight, at a temperature above the normal boiling point of the solvent.
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: March 19, 1985
    Assignee: Nordson Corporation
    Inventors: Walter H. Cobbs, Jr., William R. Rehman
  • Process for producing supports for cell cultures and supports so obtained
    Patent number: 4504547
    Abstract: The present invention relates to the use of thermosetting plastics for improving supports used for cell growth. The process according to the invention consists of applying to base supports, a solution of a thermosetting plastics material and of then subjecting the thus-coated supports to the effect of heat under conditions sufficient to permit the hardening of the thermosetting plastics material and sterilization of the thus-coated supports. The supports according to the invention are suitable for any conventional seeding and trypsination operations on cell cultures; they can also be used for the cultivation of human or animal diploid cells.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: March 12, 1985
    Assignee: Institut Pasteur
    Inventors: Florian Horodniceanu, Raphael Le Fur
  • Method of sealing of ceramic wall structures
    Patent number: 4501777
    Abstract: A method of sealing the pores in wall structures formed of sintered ceramic owders, especially silicon nitride or silicon carbide. The sealing operation is performed by pumping two reactant gases into the pores of the wall structure from opposite sides of the structure. As the gases meet one another within the pores they chemically react to form a solid ceramic sealant material, e.g., silicon nitride or silicon carbide. The reactant gases are selected so that the in situ-formed sealant corresponds chemically to the wall structure material.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: February 26, 1985
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Douglas N. Rose
  • Process for the treatment of phosphatized metal surfaces with a composition comprising trivalent titanium
    Patent number: 4497666
    Abstract: The invention relates to a composition and a process for the treatment, more precisely the "post-treatment" of phosphatized metal surfaces, particularly when the surfaces must be subsequently covered with a coat of paint. It relates also to a process for the preparation of the composition and a concentrate useful for this preparation. The composition comprises an effective proportion of trivalent titanium compound and it is presented with an acid pH, the proportion of said compound being sufficient for the corresponding composition to confer on the treated metal surface a protection equivalent to that obtained with known chromatizing solutions. More particularly, the composition contains trivalent titanium at a concentration of 0.01 to 2 g/l, preferably from 0.2 to 0.6 g/l and has a pH of 2 to 7. Reducing means can be arranged to regenerate the trivalent titanium in the treatment solution continuously.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: February 5, 1985
    Assignee: Compagnie Francaise De Produits Industriels
    Inventors: Joseph Schapira, Victor Ken, Jean-Loup Dauptain
  • Method of providing magnesium fluoride layers
    Patent number: 4492721
    Abstract: Magnesium fluoride layers are obtained by disproportionation of fluorine-containing organic magnesium compounds, notably magnesium trifluoroacetate, magnesium trifluoroacetylacetonate and magnesium hexafluoroacetylacetonate. A solution of such a compound is provided on the substrate in an organic solvent by spinning or dipping at room temperature after which the layer is heated to 500.degree. C. The solution may also be atomized and sprayed on the substrate which is maintained at a temperature of 600.degree. C. It is possible by means of this method to provide pure magnesium fluoride layers at a comparatively low temperature in air and without using film forming vehicles. The MgF.sub.2 layers obtained according to said method are useful as anti-reflective layers on display screens, on optical elements and as components in a multilayer packet, for example a dichroic mirror.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: January 8, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Paul H. Joosten, Theo J. A. Popma, Hendrikus J. P. Nabben, Henricus A. M. Van Hal, Jan Haisma
  • Silicon deposition process
    Patent number: 4491604
    Abstract: A step-wise process is disclosed for the efficient deposition of silicon. The process begins by reacting trichlorosilane and hydrogen on a heated substrate to deposit silicon. Silicon deposition efficiency of this reaction is determined by measuring the silicon to chlorine ratio in the deposition reaction effluent. The silicon-bearing effluent from the deposition reaction includes trichlorosilane, dichlorosilane, and silicon tetrachloride. The silicon-bearing effluent is collected in a first accumulator. The deposition reaction is continued using the collected quantity of silicon-bearing effluent together with an additional quantity of trichlorosilane as an input to the continuing reaction. The additional quantity of trichlorosilane is determined to make up the amount of silicon deposited in the previous step.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: January 1, 1985
    Inventors: Israel A. Lesk, Kalluri R. Sarma
  • Process for applying latex rubber coatings to asbestos-cement products
    Patent number: 4489109
    Abstract: A process for the production of a vulcanized latex protective coating bonded to the surface of an asbestos-cement article, particularly a pipe, is disclosed. The process includes a step whereby the latex coating is applied before autoclaving to the article, and becomes a hard, protective bonded layer during the autoclaving process.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: December 18, 1984
    Assignee: ASARCO Incorporated
    Inventor: Victor Puskar
  • SIPOS Deposition method
    Patent number: 4489103
    Abstract: A plurality of wafers is serially disposed between a reactant gas inlet portion and an exhaust gas outlet portion of a deposition chamber. The reactant gas comprises a predetermined mixture of N.sub.2 O and SiH.sub.4, and a positive, monotonically decreasing temperature gradient is provided between the wafer closest to the inlet portion to the wafer closest to the outlet portion, such that the thickness and resistivity of the deposited SIPOS (semi-insulating polycrystalline silicon) are substantially similar on each wafer.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: December 18, 1984
    Assignee: RCA Corporation
    Inventors: Alvin M. Goodman, Herman F. Gossenberger
  • Method of preventing a combustion furnace from corrosion
    Patent number: 4486472
    Abstract: Corrosion of a combustion furnace is prevented by a coating of an alkali metal carbonate or an alkaline earth metal carbonate formed on metal surfaces of the furnace before it has started operation.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: December 4, 1984
    Assignees: Toyo Engineering Corp., Nippon Zeon Co., Ltd.
    Inventors: Takanobu Shinohara, Toshio Anzai, Tatsuji Shinogaya
  • Process for applying thermal barrier coatings to metals
    Patent number: 4483720
    Abstract: Process for applying a protective coating to a metal substrate which provides a thermal barrier and a barrier against oxidation of the substrate. The coating material is a mixture of two metals M.sub.1 and M.sub.2, e.g., cerium (M.sub.1) and cobalt (M.sub.2), one of which when exposed to an atmosphere containing a low partial pressure of oxygen and at a high temperature forms a stable oxide, the other of which does not form a stable oxide under such conditions. A coating consisting of such a metal alloy or mixture is subjected to such conditions to produce an outer oxide layer of metal M.sub.1 and an inner metal layer of M.sub.2 alloyed with one or more components of the substrate. The oxide layer provides thermal and oxidation protection and the inner layer bonds the coating to the substrate.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: November 20, 1984
    Assignee: S R I International
    Inventors: Robert W. Bartlett, Paul J. Jorgensen
  • Method of applying ceramic coatings on a metallic substrate
    Patent number: 4481237
    Abstract: Structure coated with graded ceramic material and methods of coating application are disclosed. Techniques for maintaining low stress to strength ratios across the depth of the coating are discussed. In one particular structure the coating is applied to a metal substrate (12) and comprises a metallic bond coat (14), a first interlayer (16) of metal/ceramic material, a second interlayer (18) of metal/ceramic material having an increased proportion of ceramic and an all ceramic layer. Modulation of the metal substrate temperature during the coating process establishes a desired residual stress pattern in the part.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: November 6, 1984
    Assignee: United Technologies Corporation
    Inventors: George S. Bosshart, Alfred P. Matarese
  • Method for chromizing metallic pieces such as steel pieces and chromized metallic pieces obtained thereby
    Patent number: 4481264
    Abstract: The invention relates to a method for chromizing metallic pieces such as steel pieces and to chromized metallic pieces obtained thereby, said metallic pieces, particularly steel, comprising a chromized surface layer with a hardness at least equal to 1200 Vickers degrees and a thickness at least equal to 12 microns as well as an adjacent sub-layer with a hardness less than that of the core of said piece. The chromized surface layer has a depth preferably at least equal to 20 microns, more preferably 30 microns, and the hardness of the sublayer presents a maximum variation of 25 Vickers degrees with respect to that of the core of said piece.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: November 6, 1984
    Assignee: Societe Anonyme Dite: Aubert & Duval
    Inventor: Andre Faure
  • Fibers with multiple coatings
    Patent number: 4480898
    Abstract: Fibers are coated with two (or more) layers. A first coating liquid is applied by an applicator having a die that provides for the formation of a gap between the die and the first coated layer. A second die is located at the exit of the first die, with the second coating liquid flowing onto the fiber through a relatively narrow clearance between the first and second dies. The clearance is formed by die surfaces perpendicular to the fiber axis. This second die also provides for a gap, so that the second layer is applied at a "free surface" at the point of contact with the first coated layer. This approach eliminates turbulence and coating nonuniformities associated with prior art multiple coating techniques.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: November 6, 1984
    Assignee: AT&T Bell Laboratories
    Inventor: Carl R. Taylor