Glass Particles Or Spheres Patents (Class 428/406)
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Patent number: 5026596Abstract: An aqueouse composition of an acrylic polymer to which a water soluble peroxide radical initiator has been added, said initiator being adapted to decompose at a temperature of from about 40.degree. C. to about 180.degree. C. and act on the polymer to crosslink the same. Using the aqueous composition, a water absorbent crosslinked polymer and a water absorbent polymer-coated article can be produced through simplified processes. The water absorbent crosslinked polymer exhibits excellent water absorbing and swelling properties so that it can be advantageously utilized for the production of wet absorbent articles such as disposable diaper, sanitary napkin or the like. The water absorbent polymer-coated article is excellent in water absorption properties and can be used safely for the purposes as mentioned above.Type: GrantFiled: December 13, 1989Date of Patent: June 25, 1991Assignee: Taiyo Fishery Co., Ltd.Inventor: Kazuo Saotome
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Patent number: 4983458Abstract: A reflective marker for highway striping, signs and other surfaces is produced from a multiplicity of thermoplastic or thermosetting granules in the shape of tetrahedrons. A plurality of glass spheres having a diameter in the range of from about 6.0 microns to about 0.125 inches are substantially evenly dispersed throughout each granule with some of the spheres protruding through the outer granule surfaces. To form the granules the glass spheres, the granule material and a suitable pigment are mixed together and then applied to a flexible sheet or a roller containing a multiplicity of tetrahedron-shaped indentations. The mixture is urged into each of the indentations and is then cured. The resulting granules are removed from the indentations and are dropped from a random position onto a freshly painted highway line or other surface such that one of the flat faces on each granule is disposed in a downward direction.Type: GrantFiled: October 2, 1986Date of Patent: January 8, 1991Assignee: Potters Industries, Inc.Inventor: Robert Dejaiffe
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Patent number: 4968545Abstract: The invention relates to tubular composite constructions of a composite comprising at least one layer of a prepreg construction of continuous filaments of high modulus fiber in a resin matrix and at least one layer of a thin film of syntactic foam comprising rigid microballoons uniformly dispersed in a matrix resin cocurable with the resin matrix of the prepreg.Type: GrantFiled: November 2, 1987Date of Patent: November 6, 1990Assignee: The Dexter CorporationInventors: Michael Fellman, James J. Jarvis
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Patent number: 4965159Abstract: A carrier for use in a developer for electro-photography, which comprises a core material and provided thereon in order, an intermediate resin layer and a layer for controlling triboelectric chargeability, said resin containing as a repeating unit a fluorinated alkylmethakrylarte unit, and a developer for electrophotography using the carrier and a positively chargeable toner is disclosed.Type: GrantFiled: February 20, 1990Date of Patent: October 23, 1990Assignee: Konica CorporationInventors: Shigenori Kohno, Kenji Tsujita
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Patent number: 4960816Abstract: A mineral particulate is disclosed selected from the group consisting of metal carbonates, glass fibers and layered lattice silicates, comprising particles of said mineral, the surface of which have been modified by a polymer synthesized in situ in the presence of a reactive gas selected from the group consisting of hydrogen, carbon monoxide and carbon dioxide; said particulate having a predetermined particle size distribution which substantially corresponds to the particle size distribution of the surface-unmodified feed particulate from which the product particulate is produced.Type: GrantFiled: December 2, 1988Date of Patent: October 2, 1990Assignee: ECC America Inc.Inventor: Camilla A. Rice
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Patent number: 4959256Abstract: A cooking utensil having an enamel coating of a first enamel layer (7) covered in the zone of the bottom (1) of the utensil with a second enamel layer (3) which is in turn covered with a non-continuous third enamel layer (4) constituting a decoration and applied by screen process after drying of the first layer, these three layers (7, 3, 4) being obtained from an enamel frit and being fired simultaneously.The two enamel layers (3, 4) contain glass beads (5, 6), at least a certain number of which have a diameter of greater value than the thickness of these enamel layers and project from the surface of the layers, a certain number of beads (6) of the non-continuous third layer (4) being applied on beads (5) of the second layer (3). The second layer also contains heat-conducting flakes.The enamel coating offers enhanced resistance to wear and high thermal conductivity.Type: GrantFiled: December 27, 1988Date of Patent: September 25, 1990Assignee: SEB S.A.Inventor: Henri Piera
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Patent number: 4959264Abstract: A release paper for the manufacture of artificial leather, characterized by the release coating of the paper being essentially of a flexible poly(4-methyl pentene-1) resin (TPX) loaded with particulate mineral filler.Type: GrantFiled: January 5, 1988Date of Patent: September 25, 1990Assignee: The Wiggins Teape Group LimitedInventors: Paul Dunk, Roger M. Hindin, Peter J. Miles
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Patent number: 4939038Abstract: A light metallic composite material containing therein fine granular additives dispersed in a matrix of a light metallic material, which composite material has a light weight, high mechanical strength, and excellent characteristics such as high damping ability. The additives each have a density less than that of the matrix and heat resistance enough to withstand a heating temperature at which they are composited with the matrix. Preferably, the additives are each formed with a coating which increases mechanical strength and provides an electromagnetic characteristic different from that of the matrix. Preferably, the composite material is produced by heating a mixture of matrix powders and additives up to a temperature where only part of the mixture including no microspheres is softened but the mixture is adequately composited, an amount of additives being equal to 10% to 70% by volume of the matrix, and by forming the composited mixture into a desired shape and solidifying same.Type: GrantFiled: November 30, 1987Date of Patent: July 3, 1990Assignee: Inabata Techno Loop CorporationInventor: Tadao Inabata
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Patent number: 4935294Abstract: A composite sheet material which yields under non-uniform pressures caused by irregularities of contact between two relatively hard surfaces adapted to provide a more uniform pressure distribution comprising the combination of relatively small granules and relatively small stiff fibers in a matrix of waxy material adhered to a web of flexible material.Type: GrantFiled: November 17, 1988Date of Patent: June 19, 1990Assignee: Colgate-Palmolive CompanyInventors: Kenneth W. Misevich, Roy R. McGregor
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Patent number: 4931356Abstract: A sheet material which yields under non-uniform pressures caused by irregularities of contact between two relatively hard surfaces adapted to provide a more uniform pressure distribution comprising the combination of relatively small granules and relatively small stiff fibers in a matrix of waxy material adhered to a cover sheet of flexible material.Type: GrantFiled: November 17, 1988Date of Patent: June 5, 1990Assignee: Colgate-Palmolive CompanyInventors: Kenneth W. Misevich, Thomas E. Mintel
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Patent number: 4931498Abstract: Methods and materials are described for the preparation of novel immobilized membrane compositions. The described compositions are useful for evaluating membrane association charcteristics of chemical compounds, and as a chromatographic support material for separation/purification of biomolecules and particularly those expressed by genetically transformed cells as novel hybrid proteins having covalently bound membrane-binding peptides. Novel phospholipid carboxylates are useful intermediates for the preparation of chromatography supports having surfaces formed as covalently bound artificial membranes which simulate natural cellular membranes. The immobilized membrane compositions are adapted for use in chromatographic systems to study interactions of biologically active substances with membranes in vitro.Type: GrantFiled: February 25, 1988Date of Patent: June 5, 1990Assignee: Purdue Research FoundationInventor: Charles Pidgeon
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Patent number: 4927879Abstract: A membrane mimetic structure having a hydrophilic outer portion and a hydrophobic inner portion is covalently bound to a surface having reactive functional groups. The membrane mimetic structure consists essentially of adjacent amphiphilic molecules independently covalently bound to the surface. The structures can be applied to surfaces and should find application in a wide variety of disciplines requiring surfaces exhibiting properties of biological membranes.Type: GrantFiled: October 24, 1988Date of Patent: May 22, 1990Assignee: Purdue Research FoundationInventor: Charles Pidgeon
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Patent number: 4927688Abstract: A cast-iron element with a non-iron interior area utilizes a molding core formed of a glass material, which may be tubular or solid and may, as desired, be entirely enclosed within the casting.Type: GrantFiled: January 27, 1989Date of Patent: May 22, 1990Assignee: Eisengiesserei Monforts GmbH & Co.Inventors: Rudi Hass, Georg Jansen, Wilhelm Kallen
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Patent number: 4916014Abstract: A paint for structures comprising infrared reflecting particles of a metal oxide or noble metal on a substrate comprising a plastic or mica.Type: GrantFiled: October 30, 1987Date of Patent: April 10, 1990Inventors: Paul Weber, Michael R. Weber
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Patent number: 4906518Abstract: A filler material, having a light weight, an increased mechanical strength, and various excellent characteristics such as damping ability, as well as a composite material and a structural material thereof are provided. The filler material comprises mats made of alumina fibers, and layers of hollow silica-alumina-microspheres which are dispersed of and affixed to the associated mat, with the mats and the layers alternately stacked with each other. The composite material comprises a matrix of aluminum in which the above-mentioned filler material is filled. The structural material, which contains therein a predetermined amount of microspheres enough to provide the material with a desired vibration amplitude-frequency characteristic, is applied to a head arm for supporting a magnetic head of a disk device, for instance.Type: GrantFiled: November 17, 1988Date of Patent: March 6, 1990Assignee: Inabata Techno Loop CorporationInventor: Tadao Inabata
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Patent number: 4900767Abstract: A method of producing a mineral such as calcium carbonate, glass fibers and layered lattice silicates which is surface modified with an organic material wherein said mineral in substantially dry, particulate form is contacted with an organic monomer, co-monomers or a prepolymer, and surface polymerization or reaction in situ on the mineral is carried out in the presence of gaseous carbon monoxide.Type: GrantFiled: October 28, 1988Date of Patent: February 13, 1990Assignee: E.C.C. America Inc.Inventor: Camilla A. Rice
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Patent number: 4898770Abstract: A process for forming a continuous strand preformable mat is disclosed which consists of applying a binder matrix material which includes a thermosetting polyester binder material and a thermoplastic polyester binder to the continuous strand mat. The mat is heated such that the thermosetting binder material cures and hardens while the thermoplastic binder material softens and flows around strand intersections. The mat is thereafter cooled in order to solidify the thermoplastic polyester material of the binder matrix for additional handling for packaging and for subsequent handling by the customer. The preforms are made by heating the mat to over 200.degree. F., placing in a cold mold, and then closing the mold to form and solidify the mat shape.Type: GrantFiled: April 7, 1987Date of Patent: February 6, 1990Assignee: Owens-Corning Fiberglas CorporationInventor: Sidney G. Dunbar
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Patent number: 4895745Abstract: A pressure-sensitive adhesive tape can be produced by photopolymerization and yet its pressure-sensitive adhesive layer can have a dark appearance when it contains a pigment or dye plus finely divided hydrophobic silica. As compared to a tape which is identical except for omission of the hydrophobic silica, the adhesive layer of the tape is substantially darker and usually of substantially more intense color. Furthermore, the tape exhibits better adhesive properties than do otherwise identical tapes containing no silica. The pressure-sensitive adhesive preferably is an acrylic pressure-sensitive adhesive and may be filled with glass microbubbles which afford a foamlike appearance and character.Type: GrantFiled: February 21, 1989Date of Patent: January 23, 1990Assignee: Minnesota Mining and Manufacturing CompanyInventors: George F. Vesley, Jurgen Klingen
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Patent number: 4894310Abstract: The improved photo-sensitive recording medium carrying the photo-curing microcapsules, capable of minimizing the variation of its "sensitivity" and therefore the image recording speed at the time when the optical image is exposed.A stable "sensitivity", which makes a duplicating operation stable in any environmental conditions, is obtained by fabricating the capsule walls of the photo-curing microcapsules with inorganic substances.Type: GrantFiled: December 27, 1988Date of Patent: January 16, 1990Assignee: Brother Kogyo Kabushiki KaishaInventor: Jun Sakai
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Patent number: 4888240Abstract: A high strength self-consolidating particle comprised of a particulate substrate, a substantially cured inner resin coating and a fusible curable outer resin coating.Type: GrantFiled: August 26, 1985Date of Patent: December 19, 1989Inventors: John W. Graham, A. Richard Sinclair
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Patent number: 4888247Abstract: Heat conducting laminates and laminated heat conducting devices having at least one layer of metal and at least one layer of polymer matrix composite material having low-thermal-expansion reinforcing material distributed throughout and embedded therein. The coefficient of thermal expansion and the thermal conductivity of the laminated heat conducting devices are defined by the metal in combination with the polymer matrix material and the low-thermal-expansion reinforcing material in the laminate. The coefficient of thermal expansion and thermal conductivity of a heat conducting device can be controlled by bonding at least one layer of metal to at least one layer of polymer matrix composite material having low-thermal-expansion reinforcing material distributed throughout and embedded therein. In one embodiment, the laminated heat conducting device comprises a plurality of alternating layers of aluminum and epoxy resin having graphite fibers distributed throughout the epoxy resin.Type: GrantFiled: August 27, 1986Date of Patent: December 19, 1989Assignee: General Electric CompanyInventors: Carl H. Zweben, Rodman A. Mogle, Benjamin T. Rodini, Jr., Charles L. Thaw
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Patent number: 4879321Abstract: In or for a polymeric article incorporating a synthetic polymer and a filler material, which filler material includes glass beads bearing coatings of at least one coating agent in a total coating amount not exceeding 1%, and preferably between 0.02% and 0.2%, by weight based on the weight of uncoated beads, which coatings limit adhesion between the glass beads and the synthetic polymer and confer an increased impact resistance on the article as compared with an article which includes uncoated glass beads as filler material but is otherwise identical. Preferred coating materials include silanes, fluorocarbon compounds and synthetic polymers having shockabsorbing properties, especially synthetic polymers having a glass transition temperature (Tg), determined by differential scanning calorimetry, which is lower than 15.degree. C.Type: GrantFiled: March 30, 1988Date of Patent: November 7, 1989Assignee: GlaverbelInventor: Pierre Laroche
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Patent number: 4871477Abstract: Disclosed are foam polymer compositions having outstanding resistance to expose to flame. The compositions comprise the product of reaction of a foamable composition and certain inorganic filler materials including one or more of (A) microexplodable micron-sized particles having an internal phase of a non-flammable gas releasing inorganic particulate material such as alumina trihydrate and an external phase of fusible inorganic material such as sodium silicate, (B) particulate, expandable alkali metal silicate, and (C) a particulate inorganic fire retardant such as ammonium salt of a phosphate or polyphosphate. The foams are self-extinguishing, essentially non dripping, and generate only low levels of smoke when impacted directly with the flame of a blowtorch.Type: GrantFiled: October 20, 1988Date of Patent: October 3, 1989Assignee: Firestop Chemical CorporationInventor: Felix Dimanshteyn
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Patent number: 4871711Abstract: An active material is disclosed comprising metal oxide/hydroxide particles having chemically bonded to reactive sites on a surface thereof, a monolayer of a phosphorous-containing organic material comprised of a phosphorous-containing group and a carbon-containing group. The bond to the metal oxide/hydroxide particle surface is formed by reaction of the phosphorous-containing group with the metal oxide/hydroxide particle surface, so that the carbon-containing group of the material is oriented away from the metal oxide/hydroxide surface.Type: GrantFiled: March 9, 1987Date of Patent: October 3, 1989Assignee: Aluminum Company of AmericaInventors: Edward S. Matin, Larry F. Wieserman
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Patent number: 4869960Abstract: Ceramic particulate useful as a proppant in hydraulic fracturing and in gravel packing operations is provided which comprises a ceramic (sometimes vitreous) core surrounded by an epoxy resin coating. Novolac epoxy resin compounds without any substantial acid soluble filler are used to coat ceramic particulates similar to those disclosed in U.S. Pat. Nos. 4,680,230 and 4,632,876. The result is a product which combines the excellent solvent resistance of the ceramics with the acid resistance of the resin. The resin coating gives the added benefits of lower specific gravity and improved crush resistance.Type: GrantFiled: September 17, 1987Date of Patent: September 26, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: James L. Gibb, James A. Laird, Leslie G. Berntson
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Patent number: 4851282Abstract: Thermochromic particle-containing linear material product produced by the process characterized by dipping a core in the form of a monofilament or multifilament into a vinyl chloride resin sol composition having a thermochromic particulate material incorporated therein, the thermochromic particulate material being prepared by enclosing with a high polymer compound an electron-donating chromogenic substance, an electron-accepting substance for the chromogenic substance and a solvent having a boiling point of at least 150.degree. C. and selected from the group consisting of alcohols, amides, esters and azomethines and further covering the resulting product with a different high polymer compound; withdrawing the core from the sol composition; and heating the core to gel the sol composition and cover the core with the gelled composition.Type: GrantFiled: May 23, 1988Date of Patent: July 25, 1989Assignee: Matsui Shikiso Chemical Co., Ltd.Inventors: Goro Shimizu, Masayasu Kamada, Yoshimi Hayashi
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Patent number: 4849289Abstract: Fibres, particularly glass or rock wool fibres coated with a modified polyvinyl alcohol-based polymer and suitable for use as a base material to produce a surface coating on a backing by simultaneous spraying of the coated fibres mixed with water and a cross-linking agent. A method of producing the fibres to make them suitable to be sprayed in the manner described is also provided.Type: GrantFiled: October 1, 1987Date of Patent: July 18, 1989Assignee: Isover Saint-GobainInventors: Jean-Luc Bernard, Etienne Serein
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Patent number: 4844831Abstract: The use of combination granulates consisting of metasilicate and silica in detergent products. These combination granulates can particularly be used as anti-redeposition and antisoiling agents in detergent compositions for washing laundry.Type: GrantFiled: March 30, 1988Date of Patent: July 4, 1989Assignee: Rhone-Poulenc ChimieInventors: Daniel Joubert, Philippe Parker
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Patent number: 4830921Abstract: A packing material for liquid chromatography, which comprises an optically active compound having the formula: ##STR1## wherein Ar is a phenyl group, an .alpha.-naphthyl group or a .beta.-naphthyl group, R.sub.1 is an alkyl group having from 1 to 4 carbon atoms, a phenyl group or a 3,5-dinitrophenyl group, R.sub.2 is an alkyl group having from 1 to 4 carbon atoms, *indicates an asymmetric carbon atom and n is an integer of 2 or 3, as a stationary phase.Type: GrantFiled: December 3, 1987Date of Patent: May 16, 1989Assignee: Tosoh CorporationInventors: Ryuichi Kitayama, Katsuo Komiya, Yoshio Kato
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Patent number: 4828695Abstract: A novel packing material suitable for high pressure liquid chromatography comprising the chemically bonded, crosslinked reaction product of porous inorganic particles, with an organic silane compound having epoxy groups on the surface of the particles, and then with polyvinyl alcohol, in which the hydroxyl groups of the polyvinyl alcohol and the epoxy groups on the silane moieties react to form ether bonds, which cover almost or almost completely the residual silica hydroxyl groups on the surface of the support.Type: GrantFiled: February 10, 1988Date of Patent: May 9, 1989Assignee: Yamamura Chemical Laboratories, Co., Ltd.Inventors: Ryuji Yamamura, Mikio Tsuboi, Keishi Kitagawa, Masaru Abe
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Patent number: 4818607Abstract: The present invention provides an electrically conductive material (10) comprising a substantially spherical refractory particle (12) having an exterior surface (14) and having a diameter of no more than about 5 millimeters. An electrically conducting coating (22) substantially equally covers the entire exterior surface (14), the coating (22) having at least about 70 atomic percent carbon and being from about 10 Angstroms to about 500 Angstroms thick. A plurality of such particles (12) are useful as filler materials. Also, such particles (12) are useful as flowing electrodes. Objects containing the particles (12) have desirable electrical properties.Type: GrantFiled: May 8, 1987Date of Patent: April 4, 1989Assignee: Northrop CorporationInventors: Steven F. Rickborn, Donald Z. Rogers
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Patent number: 4816364Abstract: The present invention is intended to provide a carrier to be used as a two-component developer, wherein a nuclide particle surface has a magnetic plated layer composed of an iron oxide. The carrier according to the present invention is to be used in the electrophotographic method, electrostatic recording method, and electrostatic printing method, and also provides an excellent developer which is lightweight and has a long service life.Type: GrantFiled: September 3, 1987Date of Patent: March 28, 1989Assignee: Nippon Paint Co., Ltd.Inventors: Masao Oishi, Takao Saito, Kouichi Nagata, Katsukiyo Ishikawa, Eio Hisajima
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Patent number: 4804580Abstract: A non-combustible, inorganic heat insulation which can be sprayed onto a surface being insulated is particularly useful for forming the cold face insulation layer in a catalytic reformer housing. The insulation is formed from an inorganic cement having glass and/or ceramic microspheres mixed therein.Type: GrantFiled: July 7, 1988Date of Patent: February 14, 1989Assignee: International Fuel Cells CorporationInventor: James D. Singelyn
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Patent number: 4786555Abstract: An aqueous solution of precursors for biologically active glass, support particles coated with the solution, support particles coated with the glass, spheroidal particles of biologically active glass, processes for making the solution, coating the support, and for making the coated support and the spheroidal glass particles. The materials that comprise the biologically active glass are useful in prosthetic devices and implants for the human body.Type: GrantFiled: June 9, 1986Date of Patent: November 22, 1988Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edward G. Howard, Jr.
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Patent number: 4781968Abstract: A low dielectric constant material for use in the formation of thick film circuits such as VLSI devices. The material comprises a thick film insulation matrix of standard viscosity; a thick film organic vehicle; and a plurality of dry, hollow, glass microspheres. The insulation matrix, vehicle, and microspheres are thoroughly combined into a homogeneous material of standard viscosity.Type: GrantFiled: February 28, 1986Date of Patent: November 1, 1988Assignee: Digital Equipment CorporationInventor: David Kellerman
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Patent number: 4780491Abstract: The invention primarily concerns a pressure-sensitive adhesive tape, the adhesive layer of which is filled with glass microbubbles and has a dark appearance by virtue of (1) the microbubbles are stained glass which preferably is dark, and (2) dispersed throughout the adhesive layer is a pigment or dye which preferably is dark. More broadly, the invention concerns any coherent article filled with stained-glass microbubbles. The glass of the microbubbles preferably has an ultraviolet window, permitting the article to be made by photopolymerizing a matrix filled with the microbubbles.Type: GrantFiled: February 9, 1987Date of Patent: October 25, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventors: George F. Vesley, Alan H. Paulson
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Patent number: 4780248Abstract: Thick film electronic compositions comprising finely divided particles of electrically functional material and a PbO-compatible inorganic binder dispersed in an organic medium in which 0.1 to 10.0% wt. lead nitrate is coated on the surface of at least one of the solide components.Type: GrantFiled: February 6, 1987Date of Patent: October 25, 1988Assignee: E. I. Du Pont de Nemours and CompanyInventors: Paul C. Donohue, Vincent P. Siuta
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Patent number: 4775592Abstract: A fluoroaluminosilicate glass powder for dental glass ionomer cement, a surface of which is treated with a fluoride in an amount of from 0.01 to 5 parts by weight based on 100 parts by weight of the glass powder, is disclosed. The fluoroaluminosilicate glass powder of the invention is improved in not only physical properties such as crushing strength but also mixing workability without impairing the inherent characteristics thereof for the dental use.Type: GrantFiled: August 21, 1986Date of Patent: October 4, 1988Assignee: G-C Dental Industrial Corp.Inventors: Shoji Akahane, Kazuo Hirota, Kentaro Tomioka
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Patent number: 4769348Abstract: A process for fabrication of refractory insulating materials wherein essentially pure silica shells are mixed with a polymeric graphite precursor dissolved in a solvent. The resulting slurry is placed in a forming mold, and the solvent is evaporated to form a polymeric matrix containing the shells as a dispersion. This matrix is pyrolized under an inert or reducing atmosphere to decompose the polymer and form a first product consisting essentially of a carbon matrix containing a dispersion of silica shells. To enhance refractory characteristics, such first product is fired at high temperature in an inert or reducing atmosphere to form a second product consisting of a carbon matrix containing a dispersion of SiC-lined voids, or in a nitrogen atmosphere to form a third product consisting of the carbon matrix containing a dispersion of Si.sub.3 N.sub.4 -lined voids.Type: GrantFiled: July 28, 1986Date of Patent: September 6, 1988Assignee: KMS Fusion, Inc.Inventor: Thomas P. O'Holleran
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Patent number: 4767670Abstract: A chromatographic packing useful for the separation of oligonucleotides is disclosed. The packing includes an insert porous support particle and a silane bonded phase comprising a weak anion exchange group in close proximity to at least one polar non-ionic group.Type: GrantFiled: January 21, 1987Date of Patent: August 30, 1988Assignee: E. I. Du Pont de Nemours and CompanyInventors: Geoffrey B. Cox, Anthony Atkinson, Peter A. D. Edwardson, Michael D. Scawen
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Patent number: 4764424Abstract: Solid particles are coated with a uniform and continuous polyamide layer by immersion in a reaction medium capable of forming polyamides by anionic polymerization in solution.Type: GrantFiled: March 31, 1986Date of Patent: August 16, 1988Assignee: AtochemInventors: Roland Ganga, Jacques Grossoleil, Jean-Paul Merval
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Patent number: 4763576Abstract: A detonating energy transmittal device is provided which, when combined with even relatively low-power blasting caps, is capable of promoting and initiating the explosive detonation of liquid nitromethane, which device comprises a plurality of layers of foam material, an effective amount of frangible articles carried on at least one surface of the foam material layers and forming thereon a substantially continuous layer intermediate the adjacent foam material layer, and a cavity capable of accommodating a blasting cap and of placing said blasting cap in intimate contact with said plurality of foam material layers. Methods for detonating fluid explosives also are provided.Type: GrantFiled: April 21, 1986Date of Patent: August 16, 1988Assignee: Angus Chemical CompanyInventors: Robert E. Kass, Robert J. Frederick, Louis L. Hallock
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Patent number: 4759987Abstract: A polyimide molding powder and a process for producing the same are disclosed, said powder comprising an aggregate of polyimide particles, in which the whole or a large portion of said powder comprises polyimide particles composed of a particulate filler coated with a polyimide resin and/or polyimide particles composed of a fibrous filler coated with a polyimide resin, and said process comprising reacting an aromatic tetracarboxylic acid dianhydride and an aromatic diamino compound in an organic solvent to synthesize a polyimide precursor and imidating the polyimide precursor to precipitate polyimide particles, wherein a particulate filler and/or a fibrous filler dispersed in a prescribed amount of an organic solvent is or are added to the reaction system at any stage before the imidation of the polyimide precursor. The molding powder produces polyimide molded products free from brittleness and excellent in appearance, as well as various performance characteristics due to the improving effects of the filler.Type: GrantFiled: June 5, 1986Date of Patent: July 26, 1988Assignee: Nitto Electric Industrial Co., Ltd.Inventors: Keizo Mizobe, Koji Suzuki, Osamu Yoshikai, Yuzuru Noda
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Patent number: 4755407Abstract: A fire and wear-resistant strap material particularly useful in conjunction with fire fighting apparatus is disclosed. The strap material comprises a carrier fabric, the surfaces of which have been provided with a flexible retro-reflective coating permanently bonded thereto. The carrier fabric is preferably comprised of aramid yarns which, while having low abrasion resistance, are rendered highly wear-resistant by the retro-reflective coating, which also functions to minimize heat transfer to the supporting fabric.Type: GrantFiled: September 22, 1986Date of Patent: July 5, 1988Assignee: C.M.Offray & Son, Inc.Inventors: John A. Mortensen, Timothy A. Sands, Mark P. Henderson, Richard P. Lee, Linda B. Patterson
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Patent number: 4755422Abstract: A multilayered electronics protection system includes a first ablator layer providing thermal protection that is sprayed on to a non-metallic surface of an electronics enclosure. A second ablator layer comprised of highly conductive material is sprayed on to the first ablator layer and provides protection against strategic environmental threats.Type: GrantFiled: April 17, 1986Date of Patent: July 5, 1988Assignee: United Technologies CorporationInventors: Stephen E. Headrick, Charles E. Cataldo
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Patent number: 4751202Abstract: A process of manufacturing vitreous beads is disclosed in which feedstock particles of a glass-former composition containing chemically bound water, are fed through a heating zone in which the particles are vitrified and spherulized and the resulting vitreous beads are cooled. The size of the feedstock particles and their content of substance which becomes gaseous during the passage of the particles through said heating zone are such that a least 20% by weight of the formed beads have a relative density greater than I.O. The vitrifiable oxide forming elements of said glass-former composition may be chemically interlinked, and the feedstock may be prepared as a silica-based gel or precipitate having a composition suitable for vitrification into a glass of any desired composition for example one which by virtue of its low alkali content is resistant to hydrolytic attack.Type: GrantFiled: June 20, 1986Date of Patent: June 14, 1988Assignee: GlaverbelInventors: Francois Toussaint, Pierre Goelff
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Patent number: 4751203Abstract: A process of manufacturing vitreous beads is disclosed in which feedstock particles of a glass-former composition containing less than 15% by dry weight of sodium and potassium calculated as their respective oxides and containing chemically bound water, are fed through a heating zone in which the particles are vitrified and spherulized and the resulting vitreous beads are cooled. The vitrifiable oxide forming elements of said glass-former composition may be chemically interlinked, and the feedstock may be prepared as a silica-based gel or precipitate having a composition suitable for vitrification into a glass of a desired composition which by virtue of its low alkali content is resistant to hydrolytic attack. By control of the cellulating agent content (bound water and optionally a gas evolving salt radical such as nitrate or sulphate) of the feedstock, and its granulometry, the relative proportions of solid and hollow beads which will be produced in a given spherulizing run can be controlled.Type: GrantFiled: June 20, 1986Date of Patent: June 14, 1988Assignee: GlaverbelInventors: Francois Toussaint, Pierre Goelff
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Patent number: 4746572Abstract: A bidentate silane containing at least two silicon atoms bridged by certain groups, arranged to form at least a seven member ring system, is formed between the bidentate silane and the atoms to which the silane is covalently attached on the substrate surface.Type: GrantFiled: November 28, 1986Date of Patent: May 24, 1988Assignee: E. I. DuPont de Nemours and CompanyInventors: Joseph L. Glajch, Joseph J. Kirkland
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Patent number: 4735837Abstract: A removable adhesive sheet comprising a substrate (A) and an adhesive composition layer which comprises elastic micro-balls (B) and an adhesive (C), the adhesive composition layer being formed on an adhesive layer forming surface of the substrate, wherein the mixing proportion of the elastic micro-balls (B) to the adhesive (C) in the adhesive composition layer is 1:10 to 10:1 in terms of weight ratio, and the protrusive areas of the elastic micro-balls (B) partially protruding from the surface of the adhesive composition layer is entirely covered with the adhesive (C) has an adhesion capability that is not lowered through a frequent repetition of bonding to and removing from an adherend.Type: GrantFiled: August 8, 1985Date of Patent: April 5, 1988Assignee: Nichiban Company LimitedInventors: Hiroyasu Miyasaka, Yasuaki Kitazaki, Tetsuaki Matsuda, Junichi Kobayashi
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Patent number: 4732806Abstract: Method and apparatus is provided for reinforcing a structural member of a vehicle body by the use of adhesively bonded together glass macrospheres of 3 to 9 mm. in diameter. The adhesive is not more than about 40% by weight of the mixture so that voids remain between the adjacent macrospheres to permit airflow through the reinforcement and the reinforced structural member upon curing adhesive. The adhesive may be curable at ambient temperature or may be a high temperature curable adhesive which is cured in a vehicle body paint curing oven to bond the macrospheres to one another and to the structural member. The adhesion of the macrospheres to the structural member may be facilitated by an epoxy coated flexible sheet material lining the walls of the structural member. The adhesive coated macrospheres may be closely packed into the structural member by pouring or blowing.Type: GrantFiled: January 28, 1987Date of Patent: March 22, 1988Assignee: General Motors CorporationInventor: Joseph S. Wycech