Patents Examined by Jeffrey Culpeper
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Patent number: 5236911Abstract: The present invention provides a methacrylic resin composition which comprises a mixture of 20-99% by weight of a methacrylic resin and 1-80% by weight of a methacrylic two-layer polymer comprising the following inner layer (a) and outer layer (b) and having the following requirements (c)-(e):(a) the inner layer being obtained by polymerizing 90-99.9% by weight of a monofunctional monomer which is mainly composed of methyl methacrylate and 0.1-10% by weight of a polyfunctional monomer having at least two carbon-carbon double bonds in one molecule,(b) the outer layer being obtained by polymerizing a monofunctional monomer mainly composed of methyl methacrylate in the presence of the inner layer,(c) the weight ratio of the inner layer and the outer layer being 1:9-9:1,(d) the glass transition temperature being 50-120.degree. C., and(e) the average particle size being 200-5000 .cuberoot..This composition is excellent in processability, heat distortion resistance, mechanical properties and solvent resistance.Type: GrantFiled: April 15, 1991Date of Patent: August 17, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Teruhisa Koyama, Hideaki Matsuura
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Patent number: 5232773Abstract: Blow-moldable polybutylene terephthalate resin compositions include a polybutylene terephthalate base polymer and an effective amount of between 0.01 to 5 parts by weight (based on 100 parts by weight of the polybutylene terephthalate base polymer) of an organosilane compound to allow blow-molding of hollow articles therefrom. Optionally, the compositions further include between 0.5 to 30 parts by weight, based on 100 parts by weight of the polybutylene terephthalate base polymer, of an olefinic copolymer of an .alpha.-olefin with an .alpha.,.beta.-unsaturated glycidyl ester. The organosilane and, when present, the olefinic copolymer increase the melt tension of the compositions to an extent that a tubular parison does not increase more than 25% in length when suspended under its own weight for 10 seconds. In this manner, the polybutylene terephthalate resin compositions may be satisfactorily used to form blow-molded hollow articles.Type: GrantFiled: July 25, 1991Date of Patent: August 3, 1993Assignee: Polyplastics Co., Ltd.Inventors: Haruyasu Itoh, Masato Suzuki
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Patent number: 5227415Abstract: A biodegradable plastic composition for use in production of shaped articles includes polyglycolide and a high molecular weight substance selected from poly(3-hydroxybutyric acid), a copolymer of 3-hydroxybutyric acid and 3-hydroxyvaleric acid, polycaprolactone, polyglutamic acid, polyolefin, polyvinyl alcohol, polyalkylene oxide, cellulose acetate and mixtures thereof, the amount of the polyglycolide being 5-60 % based on the total weight of the polyglycolide and the high molecular weight substance.Type: GrantFiled: March 12, 1991Date of Patent: July 13, 1993Assignee: Director-General of Agency of Industrial Science and TechnologyInventors: Takashi Masuda, Akio Matsuda, Kazuhisa Murata, Shinsuke Yamazaki
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Patent number: 5214137Abstract: A one step process for preparing cellulose diacetates from processed film having cellulose triacetate as a base. The process involves use of an organic acid such as acetic acid and a solvolysis agent such as an alkanol or water. Hydrogen and a hydrogenation catalyst are optionally employed. The process allows for a simple way of recycling a material that presently is not recycled to any appreciable extent.Type: GrantFiled: February 8, 1991Date of Patent: May 25, 1993Assignee: Eastman Kodak CompanyInventors: Alan K. Wilson, Fred D. Barlow, Jr.
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Patent number: 5212233Abstract: Thermally curable liquid sealants for impregnating the pores of cast metal articles and powdered metal articles including a combination of five polymerizable components within stated percentage ranges essential to providing sealants that, when cured, have low weight loss when tested for heat resistance, low weight gain when tested for chemical resistance upon submersion in water, brake fluid and antifreeze, and superior sealability characteristics.Type: GrantFiled: June 28, 1991Date of Patent: May 18, 1993Assignee: Imprex, Inc.Inventor: Thomas W. Juday
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Patent number: 5209986Abstract: Polymer blends comprising:(A) 99.5-0.5 wt. % of a copolymer comprising:a1) 50-99 wt. % of C.sub.1 -C.sub.10 -alkyl- or C.sub.5 -C.sub.8 -cycloalkylethacrylates or mixtures thereof,a2) 0.5-20 wt. % of maleic acid anhydride or fumaric acid anhydride or maleimide, anda3) 0.5-40 wt. % of vinyl aromatics which may be unsubstituted or substituted on the aromatic ring with 1 or 2 alkyl groups of 1 to 4 carbon atoms; and(B) 0.5-99.5 wt. % of a copolymer comprising:b) 99.5-50 wt. % of styrene and/or .alpha.-methyl styreneb2) 0.5-50 wt. % of acrylonitrile and/or methacrylonitrile;provide thermoplastic transparent molding compositions.Type: GrantFiled: April 16, 1992Date of Patent: May 11, 1993Assignee: Rohm GmbH Chemische FabrikInventors: Jers-Dieter Fischer, Thomas Rhein, Manfred Stickler
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Patent number: 5210170Abstract: The invention relates to a process for stabilizing ester-containing plastics against degradation by heat and/or hydrolysis by the incorporation of sterically hindered isocyanate-terminated carbodiimides. The incorporable carbodiimides produce an excellent anti-aging effect and do not give rise to volatile products, even at very high temperatures.Type: GrantFiled: May 31, 1991Date of Patent: May 11, 1993Assignee: Bayer AktiengesellschaftInventors: Bernd Quiring, Thomas Munzmay, Wolfgang Henning, Eduard Mayer, Walter Meckel, Wilhelm Goyert
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Patent number: 5206325Abstract: A thermoplastic resin is formed by imparting thermoplasticity to monosaccharide and/or polysaccharide units to form engineering resin that has excellent mechanical property attributes and excellent biodegradability. A thermoplastic graft copolymer is formed by graft-polymerizing graft to backbone. The copolymer comprises backbone which constitutes the monosaccharide and/or polysaccharide units each having a functional group selected from the group consisting of the hydroxyl group, carboxyl group, amino group and amido group, and graft constituting the polyacetal units consisting of repetitive oxymethylene units --CH.sub.2 O-- that are reaction-bonded with each other through the functional group, the polyacetal units being graft-polymerized to the monosaccharide and/or polysaccharide units. The copolymer has viscosity of 0.1-10 (dl/g) and a melting point of 150.degree.-175.degree. C.Type: GrantFiled: October 25, 1991Date of Patent: April 27, 1993Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Tadashige Hata, Kazuhiko Matsuzaki, Shiyuzi Yahiro
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Patent number: 5204452Abstract: A process for inducing flocculation involving the mixing of an aqueous solution of a chitosan salt with a material to be flocculated (e.g., oil, algae, or the like) and then adding a halogenating agent (e.g., sodium hypochlorite) thus forming a N-halochitosan.Type: GrantFiled: November 14, 1990Date of Patent: April 20, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventors: Edward C. Dingilian, George E. Heinsohn
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Patent number: 5198493Abstract: A process for covalently bonding biopolymer, such as protein, to an organic polymer surface coated with hydrophilic nonionic polymer having groups reactive with the biopolymer, which comprises reacting biopolymer with the surface in a nonpolar reaction medium, preferably a microemulsion, containing from about 0.5 to about 25% water by weight, having a dielectric constant less than 10% of the dielectric constant of pure water; and the product comprises a biopolymer immobilized on a hydrophilic solid surface having a nonionic polymer and a hydrophilic layer, coupled thereto via biopolymer-reactant groups of the nonionic polymer, and accordingly has low spontaneous adsorption of proteins and other biopolymers through electrostatic attraction and/or hydrophobic interaction.Type: GrantFiled: September 13, 1991Date of Patent: March 30, 1993Assignee: Berol Nobel ABInventors: Krister Holmberg, Karin Bergstrom
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Patent number: 5196480Abstract: Thermoplastic molding materials which have high gloss and are readily colored and comprise a first graft copolymer A of an elastomeric, crosslinked acrylate polymer as the graft base and a graft shell made from a vinyl-aromatic monomer and a polar, copolymerizable, ethylenically unsaturated monomer, and a second separately prepared graft copolymer B of an elastomeric crosslinked acrylate polymer as the graft base, which is different from that in A and has a larger mean particle diameter than the graft base of copolymer A, having a first graft shell of a vinyl-aromatic monomer and a second graft shell of a mixture of a vinyl aromatic monomer and a polar-copolymerizable, ethylenically unsaturated monomer, and a hard matrix C.Type: GrantFiled: April 5, 1991Date of Patent: March 23, 1993Assignee: BASF AktiengesellschaftInventors: Friedrich Seitz, Karl Ruppmich, Juergen Vietmeier, deceased
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Patent number: 5194571Abstract: Provided are polyester compositions having thermally stable colorants copolymerized therein, said colorants comprised of at least one electron-rich aromatic moiety attached to a negatively substituted 2,5-dioxypyrrolin-3-yl moiety and containing at least one, and preferably, two polyester reactive groups. Also provided are polyester color concentrates and blends of the colored polyester compositions with other thermoplastic polymers and shaped or formed articles comprised of same.Type: GrantFiled: August 19, 1991Date of Patent: March 16, 1993Assignee: Eastman Kodak CompanyInventors: Max A. Weaver, Clarence A. Coates, William W. Parham, Samuel D. Hilbert, James J. Krutak, Wayne P. Pruett
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Patent number: 5190996Abstract: This invention presents water-resistant, formaldehyde-free starch-based corugating adhesives. The adhesives are alkaline-curing and contain 0.1-7% (by wt.) of a crosslinking agent which is a condensate of an epihalohydrin and an amine, a polyamine, or ammonia.Type: GrantFiled: January 19, 1990Date of Patent: March 2, 1993Assignee: National Starch and Chemical Investment Holding CorporationInventors: Michael Foran, Jules Schoenberg, Dilip Ray-Chaudhuri
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Patent number: 5191015Abstract: New polymer supports containing cleavable cross-links are described which are suitable for solid phase peptide synthesis and can then be solublized for further chemical or biological manipulation (including immunization) in solution.Type: GrantFiled: June 4, 1990Date of Patent: March 2, 1993Assignee: Medical Research CouncilInventors: Robert C. Sheppard, Peter Goddard
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Patent number: 5189100Abstract: Polymer blends comprising:(A) 99.5-0.5 wt. % of a copolymer comprising:a1) 50-99 wt. % of C.sub.1 -C.sub.10 -alkyl- or C.sub.5 -C.sub.8 -cycloalkylmethacrylates or mixtures thereof,a2) 0.5-20 wt. % of maleic acid anhydride or fumaric acid anhydride or maleimide, anda3) 0.5-40 wt. % of vinyl aromatics which may be unsubstituted or substituted on the aromatic ring with 1 or 2 alkyl groups of 1 to 4 carbon atoms; and(B) 0.5-99.5 wt. % of a copolymer comprising:b1) 99.5-50 wt. % of styrene and/or .alpha.-methyl styreneb2) 0.5-50 wt. % of acrylonitrile and/or methacrylonitrile;provide thermoplastic transparent molding compositions.Type: GrantFiled: April 30, 1991Date of Patent: February 23, 1993Assignee: Rohm GmbH Chemische FabrikInventors: Jens-Dieter Fischer, Thomas Rhein, Manfred Stickler
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Patent number: 5187201Abstract: Coating compositions and molding compositions containing an amount of alkyl vinyl ether polymer which is effective for improving leveling and/or preventing or eliminating foam, and the use of these copolymers for improving leveling and/or preventing or eliminating foam in coating compositions and molding compositions. The alkyl vinyl ether polymer is a copolymer containing identical or different repeating units of the formula ##STR1## in which R represents a C.sub.1-18 --alkyl group or C.sub.m F.sub.2m+1 --(CH.sub.2).sub.2 --group, where m is a number from 4 to 18, and identical or different repeating units of the formula ##STR2## in which R' represents various groups.Type: GrantFiled: January 19, 1990Date of Patent: February 16, 1993Assignee: BYK-Chemie GmbHInventors: Karl-Heinz Haubennestel, Alfred Bubat
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Patent number: 5187216Abstract: Disclosed is a process for the preparation of crystalline copolyesters from substantially amorphous, diethylene glycol-containing copolyesters wherein the a zeolite is incorporated in the substantially amorphous copolyester to promote crystallization upon heating a particulate form of the resulting copolyester at crystallizing effective temperatures.Type: GrantFiled: April 18, 1991Date of Patent: February 16, 1993Assignee: Eastman Kodak CompanyInventors: Michael L. Cassell, Waylon L. Jenkins, Gerry F. Rhodes
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Patent number: 5187167Abstract: A quinazoline of the formula:- ##STR1## wherein R.sup.1 is alkyl, cycloalkyl, alkenyl, alkynyl, alkoxy, alkylthio, aryl, aryloxy, arylalkyl, halogeno, hydroxy, mercapto, pyridylthio, pyrimidinylthio, or substituted alkyl or alkoxy;wherein R.sup.2 is hydrogen, alkyl, alkenyl, alkynyl, substituted alkyl or alkanoyl;wherein Ar is phenylene, naphthylene or heterocyclene which is unsubstituted or bears one or more substituents and wherein R.sup.3 is such that R.sup.3 --NH.sub.2 is an amino acid; or a pharmaceutically-acceptable salt or ester thereof. The compounds possess anti-tumor activity.Type: GrantFiled: October 11, 1991Date of Patent: February 16, 1993Assignee: Imperial Chemical Industries plcInventor: Leslie R. Hughes
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Patent number: 5187269Abstract: A fluorine-containing cellulose derivative of the formula:[C.sub.6 H.sub.7 O.sub.2 (OH).sub.a (OR).sub.b (OCOA).sub.c ].sub.Type: GrantFiled: February 8, 1990Date of Patent: February 16, 1993Assignee: Daikin Industries Ltd.Inventors: Nobuo Shiraishi, Motonobu Kubo
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Patent number: 5187304Abstract: Provided are 1,5-bis(4-carboxycyclohexyl)-3-pentanol and its esters and processes for their preparation. Also provided are polyester compositions containing this residue, thermosetting coating compositions containing the polyesters, and coatings and casted or molded articles made therefrom.Type: GrantFiled: May 1, 1992Date of Patent: February 16, 1993Assignee: Eastman Kodak CompanyInventors: William W. Blount, Jr., Joseph R. Zoeller