Patents by Inventor Christopher M. Flegal

Christopher M. Flegal 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).

  • Cryosorption surface for a cryopump
    Patent number: 4791791
    Abstract: A two-stage cryosorption pump has a first stage at a higher temperature and a second stage at a lower temperature. Sorption surfaces of reticulated vitreous carbon formed on the second stage have high rigidity and exceptionally high void volume.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: December 20, 1988
    Assignee: Varian Associates, Inc.
    Inventors: Christopher M. Flegal, John R. Porter