Patents by Inventor Yoon C. Lee

Yoon C. Lee 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).

  • Polyblends comprising N-phenylmaleimide copolymers and SAN copolymers
    Patent number: 4374951
    Abstract: Polyblends of N-phenyl maleimide copolymers and SAN copolymers within certain imide and acrylonitrile content ranges are found to have unique compatibility properties not displayed by related copolymer blends.
    Type: Grant
    Filed: September 11, 1981
    Date of Patent: February 22, 1983
    Assignee: Monsanto Company
    Inventors: Yoon C. Lee, deceased, Gary L. Deets, Quirino A. Trementozzi
  • Rubber modified terpolymers with improved heat distortion resistance
    Patent number: 4341695
    Abstract: Rubber-modified terpolymers of a monoalkenyl aromatic monomer, an unsaturated dicarboxylic acid anhydride and an alkyl methacrylate are found to possess an unexpectedly high heat distortion temperature over a certain range of composition.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: July 27, 1982
    Assignee: Monsanto Company
    Inventors: Yoon C. Lee, Quirino A. Trementozzi
  • Terpolymers with improved heat distortion resistance
    Patent number: 4305869
    Abstract: Terpolymers of a monoalkenyl aromatic monomer, an unsaturated dicarboxylic acid anhydride and an alkyl methacrylate are found to possess an unexpectedly high heat distortion temperature over a certain range of composition.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: December 15, 1981
    Assignee: Monsanto Company
    Inventors: Yoon C. Lee, Quirino A. Trementozzi
  • Rubber-modified terpolymer with improved molding characteristics
    Patent number: 4262096
    Abstract: Rubber-modified terpolymers of from 50 to 83% of a monoalkenyl aromatic monomer, from 15 to 30% of an unsaturated dicarboxylic acid anhydride, from 2 to 20% of an unsaturated nitrile are described which are useful as molding compositions.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: April 14, 1981
    Assignee: Monsanto Company
    Inventors: Yoon C. Lee, Quirino A. Trementozzi
  • Rubber-modified terpolymer with improved molding characteristics
    Patent number: 4223096
    Abstract: Rubber-modified terpolymers of from 50 to 83% of a monoalkenyl aromatic monomer, from 15 to 30% of an unsaturated dicarboxylic acid anhydride, from 2 to 20% of an unsaturated nitrile are described which are useful as molding compositions.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: September 16, 1980
    Assignee: Monsanto Company
    Inventors: Yoon C. Lee, Quirino A. Trementozzi
  • Tough polyblends with improved heat distortion resistance
    Patent number: 4197376
    Abstract: Polyblends are disclosed which comprise an ABS polymer blended with a rubber-modified polymer of a monoalkenyl aromatic monomer and an unsaturated dicarboxylic acid anhydride.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: April 8, 1980
    Assignee: Monsanto Company
    Inventors: Yoon C. Lee, Quirino A. Trementozzi
  • Fire retardant polymers of styrene and maleic anhydride
    Patent number: 4151218
    Abstract: Disclosed herein are fire retardant polymers of styrene and maleic anhydride. These polymers when formulated with various additives, have a UL-94 rating of at least V-1. The polymers are especially useful for use in radio and T.V. cabinets, furniture, appliance housings and other similar applications.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: April 24, 1979
    Assignee: Monsanto Company
    Inventor: Yoon C. Lee
  • Styrene/maleic anhydride copolymers
    Patent number: 4136135
    Abstract: A polymer composition comprising a styrene/maleic anhydride copolymer, a halogen-containing rubber, a halogenated aromatic flame-retardant, a flame-retardant synergist and a smoke suppressant comprising a mixture of dawsonite, calcium oxide and a magnesium compound. Such polymers have reduced combustibility and evolve less smoke when burned.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: January 23, 1979
    Assignee: Monsanto Company
    Inventor: Yoon C. Lee
  • Rubber modified fire retardant polymer compositions
    Patent number: 4108943
    Abstract: Disclosed herein are rubber modified fire retardant polymer compositions based on interpolymers of styrene, maleic anhydride, a brominated monomer such as tribromophenyl acrylate and a rubber component, which have been formulated with various additives. These compositions, which have a UL-94 rating of at least V-1, are especially useful for use in radio and T.V. cabinets, furniture, appliance housings and other similar applications.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: August 22, 1978
    Assignee: Monsanto Company
    Inventor: Yoon C. Lee
  • Polymeric alloy composition
    Patent number: 4098734
    Abstract: The present invention relates to a fusible polymeric alloy composition comprising (A) a matrix interpolymer, (B) a grafted diene rubber, (C) a polymer other than (A) or (B) having a solubility parameter in the range of 8.5 to 13 and (D) an inorganic filler. Said alloy having low thermal expansion, high modulus and toughness yet unexpectedly superior processing and molding properties for highly filled alloys.
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: July 4, 1978
    Assignee: Monsanto Company
    Inventor: Yoon C. Lee
  • Interpolymers of a styrenic monomer, a maleic or halomaleic anhydride monomer and a brominated monomer
    Patent number: 4051311
    Abstract: Disclosed herein are interpolymers of a styrenic monomer, a maleic or halomaleic anhydride monomer and a brominated monomer selected from the group consisting of bromophenyl acrylates, bromophenyl methacrylates, bromoneopentyl acrylates and bromoneopentyl methacrylates. These polymers when formulated with various additives, have a UL-94 rating of at least V-1. The polymers are especially useful for use in radio and T.V. cabinets, furniture, appliance housings and other similar applications.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: September 27, 1977
    Assignee: Monsanto Company
    Inventor: Yoon C. Lee
  • Rubber modified fire retardant polymer compositions
    Patent number: 4048263
    Abstract: Disclosed herein are rubber modified fire retardant polymer compositions based on interpolymers of styrene, maleic anhydride and a brominated monomer such as tribromophenyl acrylate, which have been formulated with various additives. These compositions, which have a UL-94 rating of at least V-1, are especially useful for use in radio and T.V. cabinets, furniture, appliance housings and other similar applications.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: September 13, 1977
    Assignee: Monsanto Company
    Inventor: Yoon C. Lee
  • Fire retardant styrenic terpolymer compositions
    Patent number: 4032509
    Abstract: Disclosed herein are fire retardant polymer compositions based on interpolymers of styrene, maleic anhydride and a brominated monomer such as tribromophenyl acrylate, which have been formulated with various additives. These compositions, which have a UL-94 rating of at least V-1, are especially useful for use in radio and T.V. cabinets, furniture, appliance housings and other similar applications.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: June 28, 1977
    Assignee: Monsanto Company
    Inventor: Yoon C. Lee