Patents by Inventor Peter T. E. Gebhard

Peter T. E. Gebhard 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).

  • Solvent cleaning system
    Patent number: 6004403
    Abstract: A improved solvent cleaning method and system which is truly a closed system in which the object to be cleaned is placed in a chamber and subjected to a negative gauge pressure to remove air and other non-condensible gases after which a solvent is introduced to the evacuated chamber and the object is cleaned and then the solvent is recovered from the object and chamber within the closed system before the clean object is removed.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: December 21, 1999
    Assignee: Gebhard Gray Associates
    Inventors: Donald J. Gray, Peter T. E. Gebhard
  • Solvent cleaning system
    Patent number: 5538025
    Abstract: A improved solvent cleaning method and system which is truly a closed system in which the object to be cleaned is placed in a chamber and subjected to a negative gauge pressure to remove air and other non-condensible gases after which a solvent is introduced to the evacuated chamber and the object is cleaned and then the solvent is recovered from the object and chamber within the closed system before the clean object is removed.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: July 23, 1996
    Assignee: SEREC Partners
    Inventors: Donald J. Gray, Peter T. E. Gebhard
  • Cleaning method and system
    Patent number: 5469876
    Abstract: A closed circuit solvent cleaning method and system in which the object to be cleaned is placed in a chamber and subjected to a negative gauge pressure to remove air and other non-condensible gases, after which a solvent is introduced to the evacuated chamber and the object is cleaned. Following this, the solvent is recovered from the object and chamber and then the clean object is removed.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: November 28, 1995
    Inventors: Donald J. Gray, Peter T. E. Gebhard
  • Cleaning method and system
    Patent number: 5240507
    Abstract: A closed circuit solvent cleaning method and system in which the object to be cleaned is placed in a chamber and subjected to a negative gauge pressure to remove air and other non-condensible gases, after which a solvent is introduced to the evacuated chamber and the object is cleaned. Following this, the solvent is recovered from the object and chamber and then the clean object is removed.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: August 31, 1993
    Inventors: Donald J. Gray, Peter T. E. Gebhard