Patents by Inventor John Derek Capper

John Derek Capper 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).

  • CFC 12 replacement refrigerant
    Patent number: 6629419
    Abstract: A refrigerant composition comprising a hydrofluorocarbon component including 1,1,1,2-tetrafluoroethane (HFC 134a), the composition further comprising an additive selected from a saturated hydrocarbon or mixture thereof boiling in the range −5 to +70° C.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: October 7, 2003
    Assignee: Refringerant Products Ltd.
    Inventors: Richard L. Powell, John Edward Poole, John Derek Capper, James Victor Thomas
  • R 22 replacement refrigerant
    Patent number: 6606868
    Abstract: A refrigerant composition comprising a hydrofluorocarbon component including 1,1,1,2-tetrafluoroethane (HCFC 134a), the composition further comprising an additive selected from a saturated hydrocarbon or mixture thereof boiling in the range −5 to +70° C.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: August 19, 2003
    Assignee: Refrigerant Products, Ltd.
    Inventors: Richard L. Powell, John Edward Poole, John Derek Capper, James Victor Thomas
  • R 12 replacement refrigerant
    Patent number: 6604368
    Abstract: A refrigerant composition comprising 1,1,1,2-tetafluoroethane (R134a) butane and pentane wherein the weights of butane, pentane and R134a are in the range: Pentane and butane  1-5% R134a 99-95%
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: August 12, 2003
    Assignee: Refrigerant Products, Ltd.
    Inventors: Richard L. Powell, John Edward Poole, John Derek Capper, James Victor Thomas