Patents Examined by Elbert L. Robert
  • Mercapto phenolic and alkylthio phenolic antioxidants
    Patent number: 4143076
    Abstract: 2-Mercapto phenol and/or 4-mercapto phenol are reacted with a compound selected from olefins, alcohols, and organic halides for example, styrene and isobutylene, to form (hydrocarbyl) thio phenolic antioxidants such as 2,6-di-tert. butyl-4-(tert.butylthio) phenol and 2,6-di(.alpha.-phenylethyl)-4-(.alpha.-phenylethylthio)phenol.
    Type: Grant
    Filed: February 22, 1978
    Date of Patent: March 6, 1979
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Kirkwood S. Cottman