Patents Examined by Henderson, C. A.
  • Copolymers of 1,3-cyclodienes, monovinylaromatic compounds and polyvinylaromatic hydrocarbons
    Patent number: 4237246
    Abstract: A 1,3-cyclodiene-monovinylaromatic copolymer is produced by polymerizing a monomer mixture comprising a 1,3-cyclodiene, a monovinylaromatic compound and a polyvinylaromatic hydrocarbon in the presence of an organolithium initiator.
    Type: Grant
    Filed: July 15, 1976
    Date of Patent: December 2, 1980
    Assignee: Phillips Petroleum Company
    Inventor: Henry L. Hsieh