Patents Examined by LaVonda DeWitt
  • Patent number: 5276075
    Abstract: An aqueous emulsion of an acrylic polymer having a glass transition temperature between 0.degree. C. and 20.degree. C., glitter, and an associative thickener which does not destabilize the glitter comprising a hydrophobically-modified cellulosic polymer, wherein after the composition is applied onto a substrate and cured, it remains dimensionally stable, flexible, and exhibits a gloss of at least 50 after at least one washing.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: January 4, 1994
    Assignee: Binney & Smith Inc.
    Inventor: Andree F. Santini
  • Patent number: 5274014
    Abstract: A stable emulsion of gilsonite, lignosulphonates and acrylic polymers in water.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: December 28, 1993
    Inventor: Albert G. Silverton
  • Patent number: 5272184
    Abstract: A metal composite and method for filling a dental cavity independent of cavity size. The dental metal composite comprises high-fusing temperature particles, low-fusing temperature particles, and a wax binder, and is inserted into the cavity to replicate the cavity, removed for heat treatment, densified, and reinserted to complete the filling operation.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: December 21, 1993
    Inventors: Itzhak Shoher, Aharon E. Whiteman
  • Patent number: 5272190
    Abstract: A rubber composition containing a powdered leather of a dispersion mixture comprising from 10 to 400 parts by weight of a powdered leather with a skin component of greater than 75% by weight, a total amount of Na.sup.+ ions and Ca.sup.2+ ions extractable with water of less than 0.5% by weight and an average grain size D.sub.50 of from 10 .mu.m to 250 .mu.m, and 100 parts by weight of rubber obtained from a raw material for the powdered leather by performing coarse pulverization, water washing, dewatering, steams swelling, drying and powderization and then separation into particles of a desired average grain size depending on the purpose of use, as well as a molding product obtained from the rubber composition.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: December 21, 1993
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Haruki Kai, Takao Inokuchi, Tohru Nishi
  • Patent number: 5272191
    Abstract: The rate of disintegration in cold water of water soluble packaging films is improved by incorporating into a film forming polymer composition, to form a dry blend or aqueous dispersion, a substantially water insoluble cellulose material prepared from alkali metal salts of carboxy(lower alkyl) cellulose or hydroxy(lower alkyl) cellulose. The increased disintegration is achieved without loss of film stability and, in some cases, the film stability is improved.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: December 21, 1993
    Assignee: FMC Corporation
    Inventors: Nagui I. Ibrahim, Richard M. Herbert
  • Patent number: 5270374
    Abstract: An anti-nitriding composition comprising a water-based alkyd resin having suspended therein particulate tin and titanium dioxide; a thixotropic agent maintains the particulates in suspension during storage and application; the composition includes surfactant and co-solvent to impart paint-like characteristics. The composition is suitable for use as a local shield during the heat treatment of metals to prevent nitriding or ferritic nitro-carburization at temperatures in the range of about 850.degree. F. to about 1150.degree. F. The water-based formulation is safe to use and to transport, and has an air drying time at normal working temperatures comparable to those drying times previously achievable only with organic-solvent based anti-nitriding compositions.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: December 14, 1993
    Inventor: Glenn O. Ratliff
  • Patent number: 5270373
    Abstract: The present invention provides a waterproofing system and method in which salt is used to prevent re-emulsification of an aqueous-based emulsion polymer primer composition which has been applied to a water penetrable building surface, whereby the bond between the building structure and a subsequently applied waterproofing membrane remains strong and durable.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: December 14, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Robert A. Wiercinski, Robert F. Jenkins, James M. Gaidis, Susan G. Ehrlich
  • Patent number: 5270378
    Abstract: A novel fluorochemical polymer surfactant reduces disuniformities in polymeric coatings. The coating composition comprising an organic solvent, an organic polymer compatible with said solvent, and a coating aid comprising a fluorinated polymer different from said polymer compatible with said solvent, said fluorinated polymer having at least three different moieties within the polymer chain derived from reactive monomers, the monomers comprising a fluorochemical acrylate, a short-chain-alkyl acrylate, and a polar monomer.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: December 14, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: David K. Johnson, Patricia M. Savu
  • Patent number: 5270351
    Abstract: Materials and methods for preparing the surface of dentin, enamel, or other natural or industrial substrates containing or capable of binding metallic ions, for adhesion of composite materials or resins, are disclosed. Preferably, the substrate is treated with an aqueous solution comprising at least one acid, acidic salt, or chelating or sequestering agent.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: December 14, 1993
    Assignee: American Dental Association Health Foundation
    Inventor: Rafael L. Bowen
  • Patent number: 5266624
    Abstract: A high load ostial or odontologic adhesive composition containing a dispersion of an innocuous adhesive polymer in an oil base and between 0.01 and 5 wt. % of a hydrolyzable phospholipid, sufficient to form a paste or gel having high cohesive strength and conformity to a mucous membrane.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: November 30, 1993
    Assignee: ISP Investments Inc.
    Inventors: William E. Prosise, Ki-Ho Chung
  • Patent number: 5264471
    Abstract: The invention relates to a process for the production of absorbers for water, aqueous solutions and body liquids, the absorbers consisting of at least two components A and B, whereby component A is at least a water-swellable synthetic polymer or copolymer, and component B is at least a natural or synthetic compound being present at normal temperature as a pourable powder which is highly or at least partially soluble, in water, or as a liquid. The present invention is characterized by the fact that component B is added in the form of a powder, a liquid or as a solution to component A during the end phase of the production process thereof after a polymer reaction degree of 90%, preferably 95% is attained, that is is mixed with the polymer gel of component A and, in order to obtain a powdery, pourable end product, is dried, if necessary, and ground.
    Type: Grant
    Filed: September 17, 1991
    Date of Patent: November 23, 1993
    Assignee: Chemische Fabrik Stockhausen GmbH
    Inventor: Miroslav Chmelir
  • Patent number: 5264465
    Abstract: A contact lens material which is suitable for producing a contact lens having intermediate and low hydrous nature and which has hardness suitable for machining by cutting and polishing, is formed of a copolymer obtained by copolymerizing a monomer mixture which contains, based on 100 parts by weight of the monomer mixture, 35 to 65 parts by weight of at least one fluorine-containing monomer of the formula (I), ##STR1## wherein R.sub.1 is CH.sub.3, R.sub.2 is H or CH.sub.3, a is an integer of 1 to 9, m is an integer of 1 to 5, n is an integer of 4 to 10, p is an integer of 8 or greater, q is an integer of 0 or greater, and p, q and n have the relationship of p+q=2n+1,and 30 to 45 parts by weight of at least one amide group-containing monomer as essential components and which also contains other monomer as an optional component. The contact lens is obtained from the above contact lens material.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: November 23, 1993
    Assignee: Hoya Corporation
    Inventors: Hideyuki Futamura, Masashi Nomura, Yuuichi Yokoyama
  • Patent number: 5264470
    Abstract: The present invention provides set retarding additives, set retarded hydraulic cement compositions including such additives and methods of using the cement compositions for cementing zones in wells. The set retarding additives are graft polymers comprised of a backbone sugar having one or more pendant polymerized or copolymerized vinyl compounds grafted thereto.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: November 23, 1993
    Assignee: Halliburton Company
    Inventor: Larry Eoff
  • Patent number: 5262458
    Abstract: Formed articles comprising destructurized starch, an ethylene-acrylic acid copolymer and a product of the interaction of starch and ethylene-acrylic acid copolymer wherein the starch not bound to the copolymer is in the form of particles having sizes below 1 micron. The water content of such articles is lower than the one usually present in the starch. Said formed articles can also contain urea in an amount no higher than 30% by weight and/or ammonia in an amount not higher than 0.5% by weight. The process for obtaining such articles comprises the steps of extruding starch, an ethylene-acrylic acid copolymer and optionally water, urea and/or ammonia at a temperature ranging from 90.degree. to 150.degree. C., reducing the water content to values lower than 6% by weight and injection molding or extrusion blowing the resulting composition.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: November 16, 1993
    Assignee: Novamont S.p.A.
    Inventors: Catia Bastioli, Vittorio Bellotti, Luciano del Giudice, Gianfranco del Tredici, Roberto Lombi, Angelos Rallis
  • Patent number: 5258422
    Abstract: The present invention relates to compostable and biodegradable thermoplastic compositions comprising a thermoplastic polymer, a hydrolytically unstable antioxidant, a pro-oxidant, an accelerator, and a property modifier. The hydrolytically unstable antioxidants effectively prevent the thermoplastic polymer from breakdown by oxidative or thermal degradation under dry conditions. Under wet conditions, the hydrolytically unstable antioxidant becomes ineffective and the thermoplastic polymers breakdown to low molecular weight materials.
    Type: Grant
    Filed: May 5, 1992
    Date of Patent: November 2, 1993
    Assignee: Tredegar Industries, Inc.
    Inventors: Peter I. Chang, Carl D. Ray, Alvin W. Gross
  • Patent number: 5258430
    Abstract: Polymer compositions useful for the production of articles of biodegradable plastics material with improved biodegradability include destructed starch and a polymer selected from the group consisting of ethylene-vinyl alcohol, polyvinyl alcohol and mixtures thereof wherein at least a portion of the said polymer is modified by the substitution of from 0.1 to 5 molar % of the functional alcohol groups in the polymer chain by X groups in which X is an oxo or an alkyl carbonyl group in which the alkyl group contains from 1 to 4 carbon atoms.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: November 2, 1993
    Assignee: Novamont S.p.A.
    Inventors: Catia Bastioli, Vittorio Bellotti, Luciano Del Guidice, Roberto Lombi
  • Patent number: 5258428
    Abstract: An oil and gas well cementing composition has styrene/butadiene latex and a combination of nonionic and anionic surfactants for improved physical properties, especially fluid loss.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: November 2, 1993
    Inventor: Sridhar Gopalkrishnan
  • Patent number: 5252704
    Abstract: A method for preparing a polymer powder which is redispersible in water by atomizing an aqueous non-polyvinyl alcohol stabilized polymer dispersion containing a dispersing aid consisting of vinyl pyrrolidone homopolymer.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: October 12, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Randall P. Bright, Jayson C. Vassallo
  • Patent number: 5252630
    Abstract: A method of controlling the attachment of organisms to an underwater surface is disclosed. The method comprises contacting the organisms with a compound of Formula I ##STR1## wherein R.sub.1 is hydrogen, hydroxyl, C.sub.1-C.sub.20 alkyl, C.sub.1-C.sub.20 alkoxy, C.sub.1-C.sub.20 aryl, C.sub.1-C.sub.20 alkyl aryl, or carbohydrate; R.sub.2 is hydrogen or hydroxyl, and R.sub.3 is hydrogen, or R.sub.2 and R.sub.3 together form an epoxide; R.sub.4 is hydrogen, hydroxyl, C.sub.1 -C.sub.4 alkoxy, or carboxylic acid; and L is selected from the group consisting of a moiety of Formula II, a moiety of Formula III, and a moiety of Formula IV ##STR2## wherein R.sub.5 is CH.sub.2, NH, O or S, R.sub.6 is CH.sub.2, NH, O or S, R.sub.7 is N or CH, and R.sub.8 is NH or O, and wherein the compound is optionally substituted from 1 to five times with halogen, hydroxyl, C.sub.1-C.sub.3 alkyl, or C.sub.1-C.sub.3 alkoxy groups at positions 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, and 12.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: October 12, 1993
    Assignee: Duke University
    Inventors: Donald J. Gerhart, Dan Rittschof, Joseph Bonaventura
  • Patent number: 5252697
    Abstract: Method, composition and structure are provided for tooth restorations comprising a urethane polymer having a crystalline polymer phase distributed in a noncrystalline polymer phase by virtue of differential reactivity of the urethane forming reagents.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: October 12, 1993
    Inventors: Richard Jacobs, Don D. Porteous