Patents by Inventor Leonard J. Kuzma

Leonard J. Kuzma 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).

  • Molecular weight control of polybutadiene
    Patent number: 4983695
    Abstract: A process for the regulation of the molecular weight of a high cis 1,4-polybutadiene prepared by polymerizing 1,3-butadiene in a solution of an aliphatic and/or cycloaliphatic solvent system employing as a catalyst system a mixture of (1) an organonickel compound, (2) an organoaluminim compound and (3) a fluorine containing compound selected from the group consisting of hydrogen fluoride and hydrogen fluoride complexes prepared by complexing hydrogen fluoride with ketones, esters, ethers, alcohols, phenols and water, said polymerization being conducted in the presence of small amounts of alpha olefins such as ethylene and propylene.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: January 8, 1991
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Leonard J. Kuzma, Kenneth F. Castner
  • Method of polymerization
    Patent number: 3985941
    Abstract: A method of polymerization of butadiene to form polymers with a high (greater than 90 percent) content of cis-1,4 configuration wherein a mixed fluoride bearing catalyst system is utilized to control the polymerization rate and the molecular weight.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: October 12, 1976
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Robert M. Pierson, Leonard J. Kuzma