Patents by Inventor George S. Li

George S. Li 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).

  • Impact-resistant, high softening maleic anhydride copolymers
    Patent number: 4137281
    Abstract: High softening polymeric compositions having good impact resistance are composed of polymerized maleic anhydride, an alpha-olefin such as diisobutylene, styrene and a preformed diene rubber such as a styrene-butadiene rubber.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: January 30, 1979
    Assignee: The Standard Oil Company
    Inventors: George S. Li, Richard J. Jorkasky, II
  • Thermoplastic acrylonitrile copolymers
    Patent number: 4136246
    Abstract: Thermoplastic polymeric compositions having high heat-distortion temperatures and good processability and handling characteristics which function as gas and vapor barrier materials which are composed of an olefinically unsaturated nitrile, such as acrylonitrile, indene and a polyolefinic monomer, such as divinyl benzene, are described.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: January 23, 1979
    Assignee: The Standard Oil Company
    Inventor: George S. Li
  • Process for preparing low-cost copolymers from acrylonitrile and crude indene
    Patent number: 4121807
    Abstract: Polymeric compositions having high heat-distortion temperatures which function as gas and vapor barrier materials which are composed of an olefinically unsaturated nitrile, such as acrylonitrile, and indene are produced by the copolymerization of said olefinically unsaturated nitrile and crude indene which can be derived from various sources.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: October 24, 1978
    Assignee: The Standard Oil Company
    Inventors: Gary W. Dirks, George S. Li, Irving Rosen
  • High softening maleic anhydride copolymers
    Patent number: 4117218
    Abstract: High softening polymeric compositions which are composed of maleic anhydride, styrene and indene are described.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: September 26, 1978
    Assignee: The Standard Oil Company
    Inventor: George S. Li
  • Thermoplastic resin blends containing polyindene or coumarone-indene resin
    Patent number: 4117040
    Abstract: Certain physical properties, such as heat-distortion temperature and flexural modulus, of certain commercially available thermoplastic resins are improved by blending with polyindene or coumarone-indene resins.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: September 26, 1978
    Assignee: The Standard Oil Company
    Inventors: George S. Li, Irving Rosen
  • Polymerizates of olefinic nitriles containing indene
    Patent number: 4109073
    Abstract: Polymeric compositions which are high softening thermoplastics are composed of an olefinically unsaturated nitrile, such as acrylonitrile, a vinyl halide, such as vinyl chloride, and indene.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: August 22, 1978
    Assignee: The Standard Oil Company
    Inventor: George S. Li
  • Rubber-modified acrylonitrile-styrene-indene interpolymers
    Patent number: 4107237
    Abstract: Thermoplastic polymeric compositions having impact resistance, improved softening temperatures, and high strengths are composed of an olefinically unsaturated nitrile, such as acrylonitrile, a vinyl aromatic monomer, such as styrene, indene, and a preformed rubber such as a butadieneacrylonitrile copolymer.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: August 15, 1978
    Assignee: The Standard Oil Company
    Inventor: George S. Li
  • Indene-chlorobutyl rubber copolymers
    Patent number: 4100226
    Abstract: Graft polymers of indene onto chlorobutyl rubber which have good impact resistance and high heat-distortion temperatures and blends of these graft polymers with commercially available thermoplastic resins are described.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: July 11, 1978
    Assignee: The Standard Oil Company
    Inventor: George S. Li
  • Cross-linked water-swellable indene-maleic anhydride interpolymers
    Patent number: 4090998
    Abstract: Polymers which are water swellable in the form of their salts are prepared by polymerization of a monomeric mixture of maleic anhydride, indene and a cross-linking monomer containing a plurality of CH.sub.2 .dbd.C< groupings.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: May 23, 1978
    Assignee: The Standard Oil Company
    Inventors: Gary W. Dirks, George S. Li, John F. Jones
  • Acrylonitrile-vinyl ether-indene or coumarone polymers
    Patent number: 4091199
    Abstract: Polymer resins which are relatively high softening and function as gas and vapor barrier materials are composed of an olefinically unsaturated nitrile, such as acrylonitrile, a vinyl ether, such as butyl vinyl ether, and indene or coumarone.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: May 23, 1978
    Assignee: The Standard Oil Company
    Inventors: George S. Li, Gary W. Dirks
  • High softening maleic anhydride copolymers
    Patent number: 4082820
    Abstract: Polymeric compositions having good impact resistance and high softening temperatures which are composed of a conjugated diene monomer, such as butadiene, maleic anhydride, indene, and optionally styrene, are described.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: April 4, 1978
    Assignee: The Standard Oil Company
    Inventors: George S. Li, Richard J. Jorkasky, II
  • Rubber-modified acrylonitrile-vinyl ether-indene polymers
    Patent number: 4082819
    Abstract: Polymer resins which are impact resistant, have high flexural strengths, are relatively high softening and function as gas and vapor barrier materials are composed of an olefinically unsaturated nitrile, such as acrylonitrile, a vinyl ether, such as butyl vinyl ether, indene and a conjugated diene rubber, such as an acrylonitrile-butadiene copolymer.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: April 4, 1978
    Assignee: The Standard Oil Company
    Inventors: George S. Li, Gary W. Dirks
  • Terpolymers comprising olefinic nitriles, N-vinylimides and indene or coumarone and process for preparing the compositions
    Patent number: 4077947
    Abstract: Polymer resins which are thermoplastic and high softening with good impermeability to gases are composed of an olefinically unsaturated nitrile, such as acrylonitrile, an N-vinyl imide, such as N-vinyl succinimide, and indene.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: March 7, 1978
    Assignee: Standard Oil Company
    Inventor: George S. Li
  • Acrylonitrile-styrene-indene interpolymers
    Patent number: 4074038
    Abstract: Thermoplastic polymeric compositions having improved softening temperatures, high strengths and gas barrier properties are composed of an olefinically unsaturated nitrile, such as acrylonitrile, a vinyl aromatic monomer, such as styrene, and indene.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: February 14, 1978
    Assignee: The Standard Oil Company
    Inventor: George S. Li
  • Thermoplastic terpolymers of acrylonitrile, vinyl esters and indene
    Patent number: 4074037
    Abstract: Thermoplastic polymer resins which are high softening are composed of an olefinically unsaturated nitrile, such as acrylonitrile, a vinyl ester, such as vinyl acetate, and indene, are described.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: February 14, 1978
    Assignee: The Standard Oil Company
    Inventor: George S. Li
  • Thermoplastic resin compositions comprising polyindene or coumarone-indene resin
    Patent number: 4066717
    Abstract: Certain physical properties, such as heat-distortion temperature and flexural modulus, of certain commercially available thermoplastic resins are improved by blending with polyindene or coumarone-indene resins.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: January 3, 1978
    Assignee: The Standard Oil Company
    Inventors: George S. Li, Irving Rosen
  • Polymerizates of olefinic nitriles and diene rubbers
    Patent number: 4020128
    Abstract: Polymeric compositions having good impact resistance, low permeability to gases, and high-softening temperatures which are composed of a conjugated diene monomer, such as butadiene, an olefinically unsaturated nitrile, such as acrylonitrile, an alpha-olefin, such as isobutylene, and indene are described.
    Type: Grant
    Filed: February 13, 1976
    Date of Patent: April 26, 1977
    Assignee: Standard Oil Company
    Inventors: Walid Y. Aziz, Lawrence E. Ball, George S. Li
  • Polymerizates of olefinic nitriles
    Patent number: 3997709
    Abstract: Polymeric resins which are high softening and function as gas and vapor barrier materials are composed of an olefinically unsaturated nitrile, such as acrylonitrile, isobutylene, and indene.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: December 14, 1976
    Assignee: Standard Oil Company
    Inventors: Walid Y. Aziz, Lawrence E. Ball, George S. Li
  • Process for the color stabilization of indene
    Patent number: 3979473
    Abstract: A process for the stabilization of indene against discoloration comprising adding to the indene a minor amount of an insoluble compound selected from the group consisting of neutral, acidic and basic inorganic salts, inorganic acids and organic acids.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: September 7, 1976
    Assignee: Standard Oil Company
    Inventors: George S. Li, Gerald P. Coffey
  • Polymerizates of olefinic nitriles and diene rubbers
    Patent number: 3950454
    Abstract: Polymeric compositions having good impact resistance, low permeability to gases, and high-softening temperatures which are composed of a conjugated diene monomer, such as butadiene, an olefinically unsaturated nitrile, such as acrylonitrile, an ester of an olefinically unsaturated acid, such as methyl acrylate, and indene are described.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: April 13, 1976
    Assignee: Standard Oil Company
    Inventors: Linda W. Hensley, George S. Li, Gerald P. Coffey