Patents by Inventor Lloyd C. Grewar

Lloyd C. Grewar 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).

  • Method and apparatus for reducing the temperature of articles
    Patent number: 4325221
    Abstract: A method of freezing animal carcasses comprises spraying the carcass with liquid nitrogen to produce a chilled outer layer thereby to seal the moisture within the carcass for the dual purpose of maintaining the quality of the meat and preventing the frosting or icing up of the heat exchange coils of a forced draught cooling system utilized subsequently to bring the entirety of the carcass to a desired chilled or frozen condition. Also disclosed is a freezing room including means for liberating a cryogenic liquid into the air stream from the fans of a forced draught cooling system for rapid pull-down of the room temperature.
    Type: Grant
    Filed: July 26, 1979
    Date of Patent: April 20, 1982
    Assignee: The Commonwealth Industrial Gases Limited
    Inventor: Lloyd C. Grewar