Patents by Inventor Joseph M. Petrowski

Joseph M. Petrowski 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 system for cryogenic refrigeration using air
    Patent number: 5267449
    Abstract: A method and system for cooling air to cryogenic temperatures [e.g., below - 100.degree. F. (- 730.degree. C.)] for use as a refrigerant medium for direct contact cooling of articles such as foodstuffs for fast freezing.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: December 7, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Edward F. Kiczek, Joseph M. Petrowski