Patents by Inventor C. Raymond Ekwall

C. Raymond Ekwall 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).

  • Prevulcanization retardation of free-radical cured rubber
    Patent number: 4857571
    Abstract: Prevulcanization of elastomer is inhibited by incorporation into the elastomer to be vulcanized, a minor amount of certain methyl substituted-aminoalkyl phenols as inhibitors or scorch retarders, and at least one of a polyfunctional (meth)acrylic monomer, allylic compound, or metal salt of unsaturated monocarboxylic acids which provides improved technical advantages as a reactive coagent in the cross-linking of such elastomeric compositions.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: August 15, 1989
    Assignee: Sartomer Company, Inc.
    Inventors: Ralph H. Reiter, C. Raymond Ekwall