Patents by Inventor Willard M. Sims

Willard M. Sims 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).

  • High impact polyamides
    Patent number: 4018731
    Abstract: A high impact polyamide resin is prepared by interpolymerizing with polyamide forming monomers a minor amount of an approximately equi-molar mixture of a low molecular weight diolefin polymer, and a dimerized fat acid or acid derivative, said diolefin polymer and dimerized fat acid or derivative having terminal amide-forming functional groups of each end of the polymer chain.
    Type: Grant
    Filed: June 12, 1975
    Date of Patent: April 19, 1977
    Assignee: Foster Grant Co., Inc.
    Inventor: Willard M. Sims
  • Zinc chloride resistant nylon
    Patent number: 3993611
    Abstract: New polymeric compositions having a resistance to zinc chloride are prepared by copolymerizing polyamide-producing monomers containing up to 9 carbon atoms in each molecule of monomer with a long chain hydrocarbon diacid and a long chain hydrocarbon diamine.
    Type: Grant
    Filed: April 17, 1975
    Date of Patent: November 23, 1976
    Assignee: Foster Grant Co., Inc.
    Inventors: Willard M. Sims, Arthur D. Bliss
  • Homogeneous blends of polyamides with vinyl aromatic resins
    Patent number: 3966839
    Abstract: Compositions based on blends of polyamide and vinyl aromatic resins having improved resistance to fibrillation may be prepared by the addition of a minor amount of a copolymer comprising a vinyl aromatic monomer and maleic anhydride followed by thorough mixing of the blend components at a temperature in excess of the melting point of the composition. Compositions prepared according to this invention exhibit improved resistance to fibrillation and good compatibility.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: June 29, 1976
    Assignee: Foster Grant Co., Inc.
    Inventor: Willard M. Sims