Patents by Inventor Richard W Liu

Richard W Liu 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).

  • Co-agglomeration of random vinyl substituted aromatic/conjugated diolefin polymer with sulfur to improve homogeneity of polymer/asphalt admixtures
    Patent number: 6348525
    Abstract: The present invention relates to the coagglomeration of random vinyl substituted aromatic/C4-C6 conjugated diolefin polymers With sulfur. Said coagglomerate is storage stable and easily blended with asphalt under a variety of mixing conditions. Further, polymer/asphalt blends prepared with the sulfur coagglomerated polymers show improved storage stability against phase separation.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: February 19, 2002
    Assignee: BASF Corporation
    Inventors: Koichi Takamura, Paul Velasco, Peter Blanpain, John Cheng, Heinz Plaumann, Richard W. Liu, Wayne Millican, Barry Baughman
  • Co-agglomeration of random vinyl substituted aromatic/conjugated diolefin polymer with sulfur to improve homogeneity of polymer/asphalt admixtures
    Patent number: 6300392
    Abstract: The present invention relates to the coagglomeration of random vinyl substituted aromatic/C4-C6 conjugated diolefin polymers with sulfur. Said coagglomerate is storage stable and easily blended with asphalt under a variety of mixing conditions. Further, polymer/asphalt blends prepared with the sulfur coagglomerated polymers show improved storage stability against phase separation.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: October 9, 2001
    Assignee: BASF Corporation
    Inventors: Koichi Takamura, Paul Velasco, Peter Blanpain, John Cheng, Heinz Plaumann, Richard W Liu, Wayne Millican, Barry Baughman
  • Vibration and noise insulating rubber compositions
    Patent number: 4626568
    Abstract: Rubber compositions are provided comprising per 100 parts by weight from about 65 to about 97 parts by weight of at least one rubber selected from the group consisting of natural rubber, synthetic cis-1,4-isoprene rubber, cis-1,4-butadiene rubber and brominated butyl rubber, and from about 3 to about 35 parts by weight of at least one carboxylated rubber selected from the group consisting of carboxylated styrene-butadiene rubber, carboxylated butadiene rubber, carboxylated isoprene rubber and carboxylated natural rubber, from about 20 to about 60 parts by weight per 100 parts by weight of rubbers of carbon black, from about 3 to about 25 phr of process oil and from about 1 to about 10 parts by weight per 100 parts by weight of rubber of metal oxide. The compositions are vulcanizable and the vulcanizates exhibit a good combination of vibration damping and noise insulating properties and are suitable for automotive engine mounts.
    Type: Grant
    Filed: August 8, 1985
    Date of Patent: December 2, 1986
    Assignee: Polysar Limited
    Inventors: Kyosaku Sato, Richard W. Liu, Seung-Tong Cheung