Patents Examined by Mark A. Forman
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Patent number: 5200263Abstract: A puncture and cut resistant composite material comprising at least one elastomeric layer containing a plurality of flat platelets oriented substantially parallel to the plane of the elastomeric layer, wherein each of the platelets is a small, thin element substantially impervious to normally encountered puncturing and/or cutting by sharp objects, and wherein the platelets by their mutual overlap substantially cover any surface to which the composite material may be applied. This new composite material is particularly well-suited to the formation of gloves.Type: GrantFiled: August 13, 1991Date of Patent: April 6, 1993Inventors: Arnold S. Gould, Larry D. Nichols
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Patent number: 5198137Abstract: An iron powder composition comprising an iron powder coated with a substantially uniform coating of a thermoplastic material and admixed with a boron nitride powder and a method of utilizing the mixture to produce a magnetic core component is provided. The iron powder mixture is formulated with up to about 1% by weight of boron nitride which reduces the stripping and sliding die ejection pressures during high temperature molding and also improves the permeability of the magnetic part over an extended frequency range.Type: GrantFiled: May 17, 1991Date of Patent: March 30, 1993Assignee: Hoeganaes CorporationInventors: Howard G. Rutz, Christopher Oliver, Brooks Quin
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Patent number: 5196263Abstract: A rubber article formed from a rubber composition having a rubber component is provided wherein the article has a texture coating thereon. A texture coating mixture is formed from a mixture of a rubber composition having a rubber component substantially the same as employed to form the rubber article, and rubber particles also having a rubber component substantially the same as that of the rubber article. A method of forming a rubber article is also provided which includes coating a rubber article with such a texture coating mixture.Type: GrantFiled: October 25, 1991Date of Patent: March 23, 1993Assignee: H & M Rubber Company, Inc.Inventors: Dennis W. Melby, James C. Moore
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Patent number: 5192620Abstract: A metallized film combination of an oriented polymeric substrate layer having on one surface thereof a coating of a blend of (a) a vinyl alcohol homopolymer or copolymer and (b) an ethylene-acrylic acid copolymer, the coating blend having a metal layer thereon. The method involves coating the substrate after the substrate has been machine direction oriented and before the combination is transverse direction oriented followed by TD orientation and finally by depositing a metal layer on the blend surface.Type: GrantFiled: November 8, 1991Date of Patent: March 9, 1993Assignee: Mobil Oil CorporationInventors: Shaw-Chang Chu, James A. Johnson
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Patent number: 5188898Abstract: Ferromagnetic metal particles the surface layer of which comprises laminatedly covered films of a ferrite compound having a spinel structure of at least one metal selected from cobalt, zinc, manganese, aluminum, chromium, nickel and copper and iron and a preparation process thereof.The particles can be used as a high density magnetic recording medium.Type: GrantFiled: April 4, 1991Date of Patent: February 23, 1993Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Kimiteru Tagawa, Seiichi Takahashi, Noritoshi Utsuno, Hideki Umehara, Fujio Hayashi, Shigeo Kiba, Satoru Suda
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Patent number: 5185207Abstract: In a phosphor for a cathode-ray tube, a composition containing SiO.sub.2 and at least one element selected from the group consisting of indium, zirconium, and antimony is adhered on the surfaces of phosphor particles.Type: GrantFiled: December 27, 1991Date of Patent: February 9, 1993Assignee: Nichia Kagaku Kogyo K.K.Inventors: Misa Furuoka, Shoichi Bando, Akio Fujii
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Patent number: 5185204Abstract: Whiskers having a diameter of 0.1-10 .mu.m and a length of 5-200 .mu.m are pelletized and granulated into agglomerates which have a size of 0.1-10 mm and a bulk density of 0.2-1.0 kg/liter.To pelletize, powders of whiskers are moistened with water while mixing to form primary aggregates. Then, the powders and the primary aggregates are subjected to a rolling movement to cause the primary aggregates to grow into secondary aggregates having desired size distribution. Finally, the secondary aggregates are dried to obtain pelletized or granulated agglomerates of whiskers.Handling of whiskers is facilitated because the agglomerates are less bulky and less likely to fly up in the air. When blended into molding materials for fiber reinforcement, however, the agglomerates are readily disintegrated back into separated individual fibers to provide homogeneous dispersion.Type: GrantFiled: June 18, 1990Date of Patent: February 9, 1993Assignee: Kawatetsu Minig Co., Ltd.Inventors: Tadao Shimizu, Yoshio Aso, Hidefumi Konnai
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Patent number: 5178948Abstract: A pelletized form of silica which is sufficiently dust free and highly dispersible in rubber formulations. The pelletized silica is produced by a process which involves pelletizing a mixture of silica and water in an inclined mixer and drying the pelletized product in a fluidized bed dryer.Type: GrantFiled: October 7, 1991Date of Patent: January 12, 1993Assignee: J. M. Huber CorporationInventor: Thomas M. Haller
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Patent number: 5173365Abstract: An ultra-thin, self-assembling molecular film has thickness, length and width dimensions. Ampliphilic molecules in the film are ordered in the thickness dimension, and are arranged in crystals that are aligned in both the length and width dimensions. This molecular alignment in all three film dimensions provides a film having more uniform properties.Type: GrantFiled: July 1, 1991Date of Patent: December 22, 1992Assignee: NanoFilm CorporationInventors: Brij P. Singh, Scott E. Rickert
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Patent number: 5165997Abstract: In a two-component system for a hardenable material, quartz grains (1) serve as a filler material and are coated with benzoyl peroxide which forms the hardener component of the system. The benzoyl-peroxide coated quartz grains are enclosed in a protective layer of pyrogenic silicic acid. As a result, the flotation capability of the quartz granules is maintained.Type: GrantFiled: March 16, 1990Date of Patent: November 24, 1992Assignee: Hilit AktiengesellschaftInventors: Ioan Gross, Hans-Jurgen Irmscher
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Patent number: 5165996Abstract: A coated refractory composition for making high quality preforms comprising a refractory material selected from a metal refractory carbide, metal refractory nitride, metal refractory boride or diamond having a coating layer of hydrous alumina or a coating layer of anhydrous crystalline alumina, and to a method for enhancing dispersibility and improving oxidation resistance of such compositions.Type: GrantFiled: May 8, 1990Date of Patent: November 24, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventor: Howard W. Jacobson
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Patent number: 5165992Abstract: A hard coating film is disclosed which is formed by hardening a coating composition containing the following component A and/or component B and component C:Component A:an organosilicon compound or a hydrolyzate thereof, said organosilicon compound being represented by the formula (I):(R.sup.1).sub.a (R.sup.3).sub.b Si(OR.sup.2).sub.4-(a+b) (I)Component B:an organosilicon compound or a hydrolyzate thereof, said organosilicon compound being represented by the formula (II): ##STR1## Component C: fine particles of tin oxide having a particle size of 1 to 100 millimicrons and coated with fine particles of tungsten oxide.The coating film is excellent in hot water resistance and transparency and finds particularly useful application to lenses for spectacles.Type: GrantFiled: July 2, 1991Date of Patent: November 24, 1992Assignee: Hoya CorporationInventor: Eiichi Yajima
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Patent number: 5147718Abstract: A radar absorber, for use as a sprayable paint, or for use as a plastic sheet, is provided. The radar absorber is used to cover a structural part of an aircraft or to shield a part of a naval vessel. The absorber, or coating in this embodiment, includes an inner layer having an elastomeric carrier material with a carbonyl iron powder dispersed therein, or disposed therein, of a regular particle size of about 4 to 5 micron, and includes an outer layer having an elastomeric carrier material with a carbonyl iron powder dispersed therein, or disposed therein, of a fine particle size of about 0.5 to 1.5 micron.Type: GrantFiled: April 24, 1990Date of Patent: September 15, 1992Assignee: ISP Investments Inc.Inventors: Sotiri A. Papoulias, Henry Seiwatz
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Patent number: 5145742Abstract: Disclosed is a configuration for a polymer pellet having improved reactivity for solid-state polymerization and less tendency to stick during processing with heat. The pellets have a reduced path length for volatiles to travel to the exterior of the pellet, and reduced contact area in a packed condition.Type: GrantFiled: August 3, 1990Date of Patent: September 8, 1992Assignee: Eastman Kodak CompanyInventor: Cheuk C. Yau
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Patent number: 5139863Abstract: Molded article having improved thermal resistance and strength formed from a homogeneous mixture comprising from about 5 to 75 percent by weight polybenzimidazole and from about 95 to 25 percent by weight of a polyaryleneketone. These articles are obtained by injection molding techniques.Type: GrantFiled: August 22, 1991Date of Patent: August 18, 1992Assignee: Hoechst Celanese CorporationInventors: Edwardo Alvarez, Lorenzo P. DiSano, Bennett C. Ward
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Patent number: 5137783Abstract: Disclosed herein are acicular magnetic metal particles containing iron as the main ingredient the surfaces of which are coated with a polymer formed from at least one of silicone compounds represented by the following formula (I):(R.sup.1 HSiO).sub.a (R.sup.2 R.sup.3 SiO).sub.b (R.sup.4 R.sup.5 R.sup.6 SiO.sub.1/2)c (I)wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 respectively represent a hydrogen atom or hydrocarbon group having 1 to 10 carbon atoms which hydrocarbon group may be substituted by at least one halogen atom, a and b are respectively 0 or integers of not less than 1, and c is 0 or 2, provided that when c is 0, the sum of a and b is an integer of not less than 3 and which have a coercive force of not less than 1400 Oe, a saturation magnetization of not less than 100 emu/g, a major axial diameter of not more than 0.25 .mu.m and an S.F.D. of not more than 0.38, and a process for producing the acicular magnetic metal particles containing iron as the main ingredient.Type: GrantFiled: April 2, 1990Date of Patent: August 11, 1992Assignees: Toda Kogyo Corporation, Shiseido Company, LimitedInventors: Mamoru Tanihara, Yasutaka Ota, Hiroshi Fukui, Takashi Ogawa, Tsuneo Suhara
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Patent number: 5122182Abstract: Two constituent powders of a powder blend for thermal spraying are in the form of composite particles containing subparticles of nickel alloy and benoite for clearance control coatings. The composite particles are formed by spray drying. In one embodiment the volume percentage of metal in one constituent powder is at least 25% greater than in the other powder. In another embodiment the difference is about 10% by volume, and the alloy rich constituent has alloy subparticles sufficiently large to act as core particles to which the finer subparticles of bentonite are bonded.Type: GrantFiled: May 2, 1990Date of Patent: June 16, 1992Assignee: The Perkin-Elmer CorporationInventors: Mitch R. Dorfman, Burton A. Kushner, Anthony J. Rotolico, Brian A. DelRe, Edward R. Novinski
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Patent number: 5112657Abstract: In the present invention, polymer binder systems are filled with inert fillers, such as calcium carbonate, and with specific thermoplastic microspheres bearing a surface coating of an inert particulate material compatible with the polymer binder system. The preferred inert particulate material on the microspheres is particulate or fibrous forms of calcium carbonate. The microspheres have a very low density, and the inert particulate for fibrous coating is thermally bonded to surface thereof. The microspheres may be employed in proportions up to as much as about 70 volume percent of the casting or molding composition, resulting in a product of exceptionally low weight and density.The products of the present invention also provide high impact strength, high resistance to cracking and crack propagation, high tensile and yield strength, and a high modulus of elasticity, particularly compared to the usual cast marble products known to the art.Type: GrantFiled: July 11, 1990Date of Patent: May 12, 1992Assignee: Pierce & Stevens CorporationInventor: George E. Melber