Patents by Inventor Robert A. Krenowicz

Robert A. Krenowicz 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).

  • Fractionation process for petroleum wax
    Patent number: 5032249
    Abstract: Heavy intermediate petroleum wax is separated into two fractions in a wiped film evaporator to provide a lower boiling fraction of narrow melting range particularly suitable for use in hot melt adhesive formulations.
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: July 16, 1991
    Assignee: Conoco Inc.
    Inventors: Richard L. Jones, Michael R. Mitchael, Robert A. Krenowicz, W. Mark Southard
  • Lubricating oil composition
    Patent number: 4123369
    Abstract: An extended service crankcase lubricating oil composition comprising a base oil and an additive package including a combination of alkaline earth metal sulfonate and alkaline earth metal phosphonate-phenate sulfide. This combination provides enhanced rust inhibition.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: October 31, 1978
    Assignee: Continental Oil Company
    Inventors: Edsel L. Miller, Robert A. Krenowicz