Patents by Inventor Richard E. Campbell

Richard E. Campbell 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).

  • Polymerization of vinyl aromatic monomers using cyclopentadienyl zirconium catalysts
    Patent number: 4808680
    Abstract: Polymers of vinyl aromatic monomers having a high degree of syndiotacticity are prepared by contacting with a catalyst comprising a cyclopentadienyl zirconium (IV) complex and polymethylaluminoxane under polymerization conditions.
    Type: Grant
    Filed: June 8, 1987
    Date of Patent: February 28, 1989
    Assignee: The Dow Chemical Company
    Inventors: Gregory F. Schmidt, Richard E. Campbell, Jr.
  • Zirconium containing catalysts and method of use
    Patent number: 4774301
    Abstract: Polymers of vinyl aromatic monomers having a high degree of syndiotacticity are prepared by contacting with a catalyst comprising a zirconium (IV) complex and polymethylaluminoxane under polymerization conditions.
    Type: Grant
    Filed: June 8, 1987
    Date of Patent: September 27, 1988
    Assignee: The Dow Chemical Company
    Inventors: Richard E. Campbell, Jr., Gregory F. Schmidt
  • Organoactinide polymer catalysts
    Patent number: 4665046
    Abstract: The specification discloses pentaalkylcyclopentadienyl actinide complexes and their use as catalysts for polymerizing lower molecular weight alkenes.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: May 12, 1987
    Assignee: The Dow Chemical Company
    Inventor: Richard E. Campbell, Jr.
  • Heterogeneous organometallic catalysts containing a supported titanium compound and at least one other supported organometallic compound
    Patent number: 4659685
    Abstract: Catalyst compositions are disclosed which are a combination of a supported titanium compound such as titanium tetraisopropoxide supported on magnesium dichloride and at least one other supported metallic catalyst such as dicyclopentadienyl zirconium dichloride supported on alumina and a cocatalyst such as aluminoxane. These catalysts are useful in the polymerization of .alpha.-olefins.
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: April 21, 1987
    Assignee: The Dow Chemical Company
    Inventors: William M. Coleman, III, Gregory F. Schmidt, Richard E. Campbell, Jr., Mark S. Delaney
  • Vehicle spare tire cover
    Patent number: D305322
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: January 2, 1990
    Inventor: Richard E. Campbell