Patents by Inventor Andrew D. Sumner

Andrew D. Sumner 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).

  • LUBRICANT FOR USE WITH CHLORINE-CONTAINING REFRIGERANTS IN COMPRESSOR APPLICATIONS
    Publication number: 20260234499
    Abstract: A composition comprising a chlorine-containing refrigerant blend and a compressor lubricant comprising: an oil of lubricating viscosity comprising at least one oxygenate; and at least one phosphorous additive. The phosphorous additive may be present at 0.1 to 4 5 wt %, based on a total weight of the compressor lubricant.
    Type: Application
    Filed: February 15, 2024
    Publication date: August 13, 2026
    Applicant: The Lubrizol Corporation
    Inventors: BRIDGETT RAKESTRAW, DAVID M. PALLISTER, ANDREW D. SUMNER, SCOTT MILLER, ZHANA ADAMS
  • LUBRICANT INCLUDING AN ESTER OF PYROMELLITIC ACID FOR REFRIGERATION SYSTEMS
    Publication number: 20260234486
    Abstract: A working fluid includes a lubricant and a refrigerant. The lubricant includes a tetra-alkyl ester of pyromellitic acid (1,2,4,5-benzenetetracarboxylic acid) and the refrigerant may include a hydrofluoroolefin. A method of lubricating a compressor of a refrigeration system includes forming a working fluid in the refrigeration system. The working fluid includes a lubricant and a refrigerant. The lubricant includes a tetra-alkyl ester of pyromellitic acid and the refrigerant may include a hydrofluoroolefin.
    Type: Application
    Filed: January 17, 2024
    Publication date: August 13, 2026
    Applicant: The Lubrizol Corporation
    Inventors: Bridgett K. Rakestraw, David M. Pallister, Andrew D. Sumner, Scott Miller, Zhana Adams