Patents by Inventor Cheryl A. Engels

Cheryl A. Engels 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).

  • Cryogenic rectification system with dual phase turboexpansion
    Patent number: 5564290
    Abstract: A cryogenic rectification system for producing elevated pressure gaseous oxygen wherein pressurized liquid oxygen is vaporized against pressurized working fluid which is then turboexpanded to form a dual phase stream having both vapor and liquid fractions.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: October 15, 1996
    Assignee: Praxair Technology, Inc.
    Inventors: Dante P. Bonaquist, John H. Ziemer, Cheryl A. Engels, James B. Wulf, Robert A. Beddome