Patents Assigned to Intermagnetics General Corporation-Polycold Systems, Inc.
  • Refrigerant blend free of R-22 for use in ultralow temperature refrigeration
    Patent number: 6481223
    Abstract: Refrigerants containing R-22 are replaced with new blends by using R-125, or R-125 with R-124, or R-218, or R-218 with R-124, in place of R-22. No hardware or oil composition changes are required to maintain temperatures, pressures and capacity substantially unchanged in a refrigeration system.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: November 19, 2002
    Assignee: Intermagnetics General Corporation-Polycold Systems, Inc.
    Inventors: Kevin P. Flynn, Mikhail Boiarski, Tamirisa V. V. R. Apparao, Oleg Podtcherniaev, Vladimir Mogorichny