Patents by Inventor Zbigniew Tadeusz Fidowski

Zbigniew Tadeusz Fidowski 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
    Patent number: 6484516
    Abstract: A cryocooler system comprising a heat exchanger for cooling a compressed returning warmed cryogenic fluid stream, the heat exchanger having a bypass loop to produce a major stream and a minor stream exiting the heat exchanger. The minor stream is further cooled by expansion and used as a heat exchange medium for an external heat load after which it is compressed and returned to the heat exchanger for heat exchange with the compressed return warmed cryogenic fluid stream. The major stream is further cooled by expansion and recirculated to the heat exchanger to cool the compressed returning warmed cryogenic fluid stream. The major stream and minor stream are combined either inside or outside of said heat exchanger to form the warmed cryogenic fluid inlet stream for compression.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: November 26, 2002
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Rakesh Agrawal, Zbigniew Tadeusz Fidowski, Donn Michael Herron, William Curtis Kottke