Patents by Inventor Carl Fraser Mathews

Carl Fraser 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).

  • Opaque molecularly oriented and heat set linear polyester film and process for making same
    Patent number: 3944699
    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: October 19, 1973
    Date of Patent: March 16, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Carl Fraser Mathews, Christopher Deverell, Gordon Edmund Alfred Pears, Peter George Knowles