Patents Represented by Law Firm Ross & Howison
  • Plastic closure with unitarily molded, foamed sealing layer
    Patent number: 4744478
    Abstract: A molded polymeric container closure comprising at least one substantially unfoamed polymer layer and an integrally molded foamed layer of the same polymer.
    Type: Grant
    Filed: October 23, 1986
    Date of Patent: May 17, 1988
    Assignee: Permian Research Corporation
    Inventor: Granville J. Hahn