Patents by Inventor David C. Krammer

David C. Krammer 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).

  • REFRIGERATION OIL FROM GAS-TO-LIQUID DERIVED AND BIO-DERIVED DIESTERS
    Publication number: 20130043424
    Abstract: The present invention is directed to a refrigerator oil composition comprising (a) at least one diester species having the following structure: wherein R1, R2, R3, and R4 are the same or independently selected from hydrocarbon groups having from 2 to 17 carbon atoms; and (b) a refrigerant.
    Type: Application
    Filed: July 19, 2012
    Publication date: February 21, 2013
    Applicant: Chevron U.S.A. Inc.
    Inventors: David C. Krammer, Ravindra Shah, Stephen J. Miller, Saleh Elomari
  • Refrigeration oil from gas-to-liquid-derived and bio-derived diesters
    Patent number: 8268187
    Abstract: The present invention is directed to a refrigerator oil composition comprising (a) at least one diester species having the following structure: wherein R1, R2, R3, and R4 are the same or independently selected from hydrocarbon groups having from 2 to 17 carbon atoms; and (b) a refrigerant.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: September 18, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: David C. Krammer, Ravindra Shah, Stephen J. Miller, Saleh Elomari
  • REFRIGERATION OIL FROM GAS-TO-LIQUID-DERIVED AND BIO-DERIVED DIESTERS
    Publication number: 20120018667
    Abstract: The present invention is directed to a refrigerator oil composition comprising (a) at least one diester species having the following structure: wherein R1, R2, R3, and R4 are the same or independently selected from hydrocarbon groups having from 2 to 17 carbon atoms; and (b) a refrigerant.
    Type: Application
    Filed: August 18, 2011
    Publication date: January 26, 2012
    Inventors: David C. Krammer, Ravindra Shah, Stephen J. Miller, Saleh Elomari