Patents by Inventor Roger F. Williams

Roger F. Williams 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 cleaning process
    Patent number: 4491484
    Abstract: A cryogenic liquid is used to directly or indirectly cool solid or liquid contaminants adhering to apparatus surfaces to effect a change in the physical characteristics of the contaminants and thereby render them more susceptible to removal operations.
    Type: Grant
    Filed: July 14, 1983
    Date of Patent: January 1, 1985
    Assignee: Mobile Companies, Inc.
    Inventor: Roger F. Williams
  • Cryogenic cleaning process
    Patent number: 4409034
    Abstract: A cryogenic liquid is used to directly or indirectly cool solid or liquid contaminants adhering to apparatus surfaces to effect a change in the physical characteristics of the contaminants and thereby render them more susceptible to removal operations.
    Type: Grant
    Filed: November 24, 1981
    Date of Patent: October 11, 1983
    Assignee: Mobile Companies, Inc.
    Inventor: Roger F. Williams