Patents by Inventor Robert E. Pratt

Robert E. Pratt 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).

  • Trisilahydrocarbon lubricants
    Patent number: 4788312
    Abstract: Trisilahydrocarbon synthetic lubricant base stocks are prepared by the reaction of dienes containing four to sixteen carbon atoms with dihalosilanes, followed by further reaction of the bis(alkenyl)dihalosilane intermediates with trihalosilanes or trialkylsilanes, followed by substitution of the halogen atoms in the second intermediates by organometallic compounds or by hydridometallic compounds plus olefins.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: November 29, 1988
    Assignee: Technolube Division Lubricating Specialties Co.
    Inventors: Kazimiera J. L. Paciorek, Robert E. Pratt, Joseph G. Shih
  • Process for producing lubricant material
    Patent number: 4587368
    Abstract: A process is described for the production of a synthetic hydrocarbon especially useful as a base for high performance motor oils. The material is a oligomer of alpha-olefin monomer having a uniquely selective product distribution emphasizing tetramers and pentamers. This distribution is achieved through a controlled polymerization involving an initial oligomerization step followed by the delayed addition of fresh monomer to improve the yield of the desired tetramers and pentamers.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: May 6, 1986
    Assignee: Burmah-Castrol, Inc.
    Inventor: Robert E. Pratt