Patents by Inventor Bi Le-Khac

Bi Le-Khac 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).

  • Extended shelf life water-absorbing composition which facilitates fiber formation
    Patent number: 4880868
    Abstract: A copolymer of recurring units of at least one .alpha., .beta.-unsaturated monomer and recurring units of at least one copolymerizable comonomer comprising, in its preferred embodiment from about 20 to about 80 percent pendant carboxylic acid units and from about 80 to about 20 percent pendant carboxylate salt units, is blended with at least one monomer containing at least two hydroxyl groups to produce a water-absorbing composition upon curing. The composition is particularly suitable for fiber formation.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: November 14, 1989
    Assignee: Arco Chemical Technology, Inc.
    Inventor: Bi Le-Khac
  • Ultrahigh water-absorbing fiber forming composition
    Patent number: 4813945
    Abstract: A copolymer of recurring units of at least one .alpha..beta.-unsaturated monomer and recurring units of at least one copolymerizable comonomer comprising, in its preferred embodiment from about 20 to about 80 percent pendant carboxylic acid units and from about 80 to about 20 percent pendant carboxylate salt units, is blended with a heterocyclic carbonate to produce a water-absorbing composition upon curing. The composition is particularly suitable for fiber formation.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: March 21, 1989
    Assignee: Arco Chemical Technology, Inc.
    Inventor: Bi Le-Khac
  • Sugar-containing water-absorbing composition which facilitates fiber formation
    Patent number: 4788237
    Abstract: A copolymer of recurring units of at least one .alpha.,.beta.-unsaturated monomer and recurring units of at least one copolymerizable comonomer comprising, in its preferred embodiment from about 20 to about 80 percent pendant carboxylic acid units and from about 80 to about 20 percent pendant carboxylate salt units, is blended with at least one disccharide or oligosaccharide to produce a water-absorbing composition upon curing. The composition is particularly suitable for fiber formation.
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: November 29, 1988
    Assignee: ARCO Chemical Company
    Inventor: Bi Le-Khac
  • Alkyl vinyl ether/N-arylmaleimide copolymer containing polymer alloy
    Patent number: 4764558
    Abstract: A thermodynamically miscible polymer composition containing a copolymer having recurring units of an alkyl vinyl ether and recurring units of an N-aryl substituted maleimide and an acrylonitrile copolymer is disclosed.
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: August 16, 1988
    Assignee: Arco Chemical Company
    Inventor: Bi Le-Khac
  • Polymer composition containing polycarbonate, a styrenic/maleimide/cyclic anhydride terpolymer and a terpolymer grafted to a polymer matrix
    Patent number: 4749746
    Abstract: A polymer composition which contains a polycarbonate resin, a styrenic/maleimide/cyclic anhydride terpolymer, and an ethylene/propylene/nonconjugated diene terpolymer chemically grafted with either styrene/acrylonitrile copolymer, methylmethacrylate/N-phenylmaleimide copolymer or polymethylmethacrylate is disclosed. The composition exhibits excellent impact strength properties upon molding.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: June 7, 1988
    Assignee: ARCO Chemical Company
    Inventors: Barry D. Dean, Bi Le-Khac
  • Extended shelf life water-absorbing composition which facilitates fiber formation
    Patent number: 4731067
    Abstract: A copolymer of recurring units of at least one .alpha., .beta.-unsaturated monomer and recurring units of at least one copolymerizable comonomer comprising, in its preferred embodiment from about 20 to about 80 percent pendant carboxylic acid units and from about 80 to about 20 percent pendant carboxylate salt units, is blended with at least one monomer containing at least two hydroxyl groups to produce a water-absorbing composition upon curing. The composition is particularly suitable for fiber formation.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: March 15, 1988
    Assignee: ARCO Chemical Company
    Inventor: Bi Le-Khac
  • Water absorbent polymer composition
    Patent number: 4705773
    Abstract: Water-insoluble, water swellable polymer compositions are disclosed. In one embodiment, the polymer composition comprises a copolymer of styrene and meleic anhydride and a multi arm block copolymer of styrene and ethylene oxide. In a preferred embodiment, the maleic anhydride groups of the anhydride-containing copolymer are treated with a strong base to further enhance absorption capacity.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: November 10, 1987
    Assignee: Atlantic Richfield Company
    Inventor: Bi Le-Khac
  • Water absorbent polymer composition
    Patent number: 4616063
    Abstract: Water-insoluble, water swellable polymer compositions are disclosed. In one embodiment, the polymer composition comprises a copolymer of styrene and maleic anhydride and a multi arm block copolymer of styrene and ethylene oxide. In a preferred embodiment, the maleic anhydride groups of the anhydride-containing copolymer are treated with a strong base to further enhance absorption capacity.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: October 7, 1986
    Assignee: Atlantic Richfield Company
    Inventor: Bi Le-Khac
  • Thermodynamically miscible polymer composition
    Patent number: 4605700
    Abstract: A thermodynamically miscible polymer composition containing of a copolymer having recurring units of a C.sub.2 to C.sub.4 .alpha.-olefin and recurring units of an N-aryl substituted maleimide and an acrylonitrile copolymer is disclosed.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: August 12, 1986
    Assignee: Atlantic Richfield Company
    Inventor: Bi Le-Khac
  • Polymeric molding composition
    Patent number: 4522983
    Abstract: Polymeric composition having good impact resistance which comprises styrene, methylstyrene, a conjugated diene monomer, and optionally an unsaturated dicarboxylic acid anhydride, are described.
    Type: Grant
    Filed: March 9, 1983
    Date of Patent: June 11, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Bi Le-Khac, Clyde Sharik
  • Polymer compositions
    Patent number: 4493920
    Abstract: A polymer composition comprising a thermoplastic polycarbonate and a terpolymer of recurring units of a monovinyl aromatic monomer recurring units of a maleimide monomer and recurring units of an .alpha., .beta. ethylenically unsaturated cyclic anhydride monomer is disclosed.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: January 15, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Bi Le-Khac
  • Polyblend of styrene copolymers and molded article produced therefrom
    Patent number: 4408010
    Abstract: The use of a styrenic copolymer of maleimide to improve the heat resistant properties of styrene/maleic anhydride copolymers is disclosed.
    Type: Grant
    Filed: October 4, 1982
    Date of Patent: October 4, 1983
    Assignee: Atlantic Richfield Company
    Inventor: Bi Le-Khac