Patents by Inventor Percy C. Hughes, III

Percy C. Hughes, III 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).

  • Colored salts of polymeric sulfonate polyanions and dye cations, and light-absorbing coatings made therewith
    Patent number: 5240780
    Abstract: Light-stable film-forming salts of a sulfonated polymer, especially a sulfonated polyester, and a cationic dye. When these dye-polysalts are coated onto shaped polymeric structures, especially transparent self-supporting films, the resultant products have important optical uses. A polyester film coated with certain red or amber blends of dye-polysalts and provided with a pressure-sensitive adhesive coating is useful as a lithographers' tape.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: August 31, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: George V. D. Tiers, Percy C. Hughes, III