Patents by Inventor Martin A. Krevalis, Jr.

Martin A. Krevalis, Jr. 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 working fluid compositions containing difluoroethane or pentafluoroethane and a polyolester lubricant
    Patent number: 5494597
    Abstract: There are disclosed refrigeration working fluid compositions comprising R125 (pentafluoroethane) or R152a (1,1-difluoroethane) refrigerants and certain polyol esters of C.sub.7 to C.sub.10 branched alkanoic acids or mixtures of such branched acids with linear C.sub.7 to C.sub.10 monoalkanoic acids. The polyols are neopentylglycol, technical grade pentaerythritol and trimethylolpropane; the esters exhibit suitable viscosity ranges and miscibility with refrigerants over a broad compositional range. The acids have a defined average effective carbon chain length in order to be miscible with the refrigerants over the range of 5 to 55 wt. % ester lubricant.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: February 27, 1996
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Martin A. Krevalis, Jr., Richard H. Schlosberg, Carolyn B. Duncan
  • Refrigeration working fluid compositions containing trifluoroethane and neopentyl glycol or trimethylolpropane esters of C.sub.7 and C.sub.9 acids
    Patent number: 5470497
    Abstract: There are disclosed refrigeration working fluid compositions comprising 1,1,1-trifluoroethane refrigerant and either a neopentylglycol ester of 3,5,5-trimethylhexanoic acid or a trimethylolpropane ester of a mixture of 65 wt. % 3,5,5-trimethylhexanoic acid, 22.2 wt. % n-heptanoic acid and 12.8 wt. % methylhexanoic acid. The esters exhibit suitable viscosity ranges and miscibility with the refrigerant over a broad compositional range.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: November 28, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Richard H. Schlosberg, Carolyn B. Duncan, Martin A. Krevalis, Jr.