Patents by Inventor Alton L. Higgins

Alton L. Higgins 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).

  • Process for polymerizing high nitrile ABS polyblends
    Patent number: 4120851
    Abstract: The process relates to polymerizing mixtures of diene rubber with a monomer formulation comprising monovinylidene aromatic and ethylene unsaturated nitrile monomers wherein a late add of monovinylidene aromatic monomer is added after 85 to 98% conversion of the monomer formulation providing high nitrile ABS polyblends having improved color and toughness.
    Type: Grant
    Filed: August 22, 1977
    Date of Patent: October 17, 1978
    Assignee: Monsanto Company
    Inventors: Henry K. Chi, Alton L. Higgins