Patents Assigned to Prestone Products LLC
  • Heat transfer fluids and corrosion inhibitor formulations for use thereof
    Patent number: 12215272
    Abstract: Heat transfer fluid concentrates include: (a) a freezing point depressant; and (b) a non-ionic surfactant comprising (i) a corrosion inhibitor for copper and copper alloys and (ii) a polyalkylene glycol. A conductivity of the heat transfer fluid concentrate is less than or equal to about 100 S/cm. Ready-to-use heat transfer fluids and methods for preventing corrosion in heat transfer systems are described.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: February 4, 2025
    Assignee: Prestone Products LLC
    Inventors: Bo Yang, Peter M. Woyciesjes