Patents by Inventor Andrew Klein

Andrew Klein has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Expandable hollow particles
    Patent number: 5834526
    Abstract: Microspheres are described which have a shell of thermally expandable polymer and a hollow interior that contains a fluorinated hydrocarbon that boils at a temperature below the melting point of the polymer, and contains an organic ester or ether or ketone. The ester or ether or ketone improves the quality of microsphere product. The expandable particles are useful in insulation, packaging, for expanding other polymer such as polytetrafluoroethylene, and the like.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: November 10, 1998
    Inventors: Huey S. Wu, Fuming Sun, Victoria L. Dimonie, Andrew Klein
  • Polyvinyl chloride modified with butadiene-containing core-shell composite polymers for enhanced impact strength
    Patent number: 4448932
    Abstract: This invention relates to a polyvinyl chloride resin composition containing said resin and a significant amount of a polymer of butadiene in the form of a shell-core polymer wherein a polymer of methylmethacrylate forms said shell and completely encapsulates the core containing the butadiene polymer.
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: May 15, 1984
    Assignee: GAF Corporation
    Inventors: Yehuda Ozari, Suzanne B. Nelsen, Andrew Klein
  • Thickened acrylic polymer latices
    Patent number: 4346190
    Abstract: Acrylic polymer latex thickened with a latex containing a copolymer derived from (1) methacrylic acid or ethacrylic acid, and (2) methylacrylate.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: August 24, 1982
    Assignee: GAF Corporation
    Inventors: Eugene S. Barabas, Andrew Klein, Dru W. Alwani
  • Thickened butadiene-styrene latices
    Patent number: 4321181
    Abstract: Butadiene-styrene latex thickened with an emulsion containing a terpolymer derived from (1) methacrylic acid or ethacrylic acid; (2) a C.sub.1-8 alkylester of acrylic, methacrylic or ethacrylic acid, and; (3) acrylamide or styrene optionally nuclearly substituted by methyl or ethyl.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: March 23, 1982
    Inventors: Eugene S. Barabas, Andrew Klein, Dru W. Alwani
  • Preparation of linear cyclic polyimides from latices
    Patent number: 4169924
    Abstract: Linear cyclic polyimides are prepared by reacting a latex prepolymer with ammonia, an organic primary amine, hydroxylamine or a mixture thereof, at a temperature between 50.degree. C. and 300.degree. C. The prepolymer contains reactive functional groups, such as carboxyl, amide, alkyl ester and nitrile. The linear cyclic polyimides are thermoplastic materials.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: October 2, 1979
    Assignee: GAF Corporation
    Inventors: Eugene S. Barabas, Andrew Klein
  • Preparation of copolymer emulsions of an .alpha.,.beta.-unsaturated carboxylic acid and methyl acrylate
    Patent number: 4138380
    Abstract: Copolymer emulsions comprising (1) an .alpha.,.beta.-unsaturated carboxylic acid and (2) methyl acrylate are useful as thickening agents, particularly in acrylic polymer latices. An especially effective thickening agent is obtained when the copolymer emulsion is prepared using the dioctyl ester of sulfosuccinic acid as a surfactant.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: February 6, 1979
    Assignee: GAF Corporation
    Inventors: Eugene S. Barabas, Andrew Klein
  • Thickening butadiene-styrene latices with terpolymer emulsions
    Patent number: 4128520
    Abstract: Terpolymer emulsions comprising (1) an .alpha.,.beta.-unsaturated carboxylic acid (2) an alkyl ester of an .alpha.,.beta.-unsaturated carboxylic acid, and (3) an amide of an .alpha.,.beta.-unsaturated carboxylic acid or styrene or a derivative thereof of the formula ##STR1## in which R.sub.2 is hydrogen, methyl or ethyl are useful as thickening agents, particularly in butadiene-styrene latices.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: December 5, 1978
    Assignee: GAF Corporation
    Inventors: Eugene S. Barabas, Andrew Klein, Dru W. Alwani
  • Copolymer emulsions for thickening acrylic polymer latices
    Patent number: 4110291
    Abstract: Copolymer emulsions comprising (1) an .alpha.,.beta.-unsaturated carboxylic acid and (2) methyl acrylate are useful as thickening agents, particularly in acrylic polymer latices.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: August 29, 1978
    Assignee: GAF Corporation
    Inventors: Eugene S. Barabas, Andrew Klein, Dru W. Alwani