Patents by Inventor Carl F. Mathews

Carl F. Mathews 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).

  • Graft copolymers containing rubber, acrylonitrile and an aromatic olefin
    Patent number: 4205020
    Abstract: A graft copolymer comprises a substrate of a diene rubber, and a homogeneous superstrate containing units of acrylonitrile and at least one aromatic olefin having a molar ratio of acrylonitrile to olefin between 2 and 9. The superstrate may also contain a minor amount (preferably less than 10 mole %) of at least one other comonomer selected from acenaphthylene, vinyl carbazole and its derivatives, maleimide and its N-substituted derivatives and norbornene and its derivatives.
    Type: Grant
    Filed: February 13, 1979
    Date of Patent: May 27, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventors: Brian N. Hendy, Carl F. Mathews, Eric Nield, John B. Rose, Peter I. Vincent
  • Voided films of polyester with polyolefin particles
    Patent number: 4187113
    Abstract: Opaque voided films having a total luminous transmission not exceeding 25% are made from blends of a polyester preferably polyethylene terephthalate, with 3 to 27% of an ethylene or propylene polymer, prepared by dry blending. One end use of the film, as a base for photographic prints is also described.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: February 5, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventors: Carl F. Mathews, Christopher Deverell, Gordon E. A. Pears, Peter G. Knowles
  • Blends of acrylonitrile copolymers with graft copolymers containing rubber and acrylonitrile copolymer
    Patent number: 4151224
    Abstract: A graft copolymer comprises a substrate of a diene rubber, and a homogeneous superstrate containing units of acrylonitrile and at least one aromatic olefin having a molar ratio of acrylonitrile to olefin between 2 and 9. The superstrate may also contain a minor amount (preferably less than 10 mole %) of at least one other comonomer selected from acenaphthylene, vinyl carbazole and its derivatives, maleimide and its N-substituted derivatives and norbornene and its derivatives.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: April 24, 1979
    Assignee: Imperial Chemical Industries Limited
    Inventors: Brian N. Hendy, Carl F. Mathews, Eric Nield, John B. Rose, Peter I. Vincent