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
  • Dry cleaning and degreasing system
    Patent number: 5702535
    Abstract: Clothes are dry cleaned by placing the clothes in a tumbler/dryer, sealing the tumbler/dryer, applying a negative gauge pressure to the tumbler/dryer, providing solvent to the tumbler/dryer, activating the tumbler/dryer to dry clean the clothes, removing the solvent from the tumbler/dryer, and simultaneously throttling hot solvent vapor into the tumbler/dryer while removing vapor from the tumbler/dryer in order to dry the clothes.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 30, 1997
    Assignee: Gebhard-Gray Associates
    Inventors: Donald J. Gray, Peter T. E. Gebhard, III
  • Filter regeneration system
    Patent number: 5630434
    Abstract: Stripping contaminants/impurities from a filter includes subjecting the filter to a negative gauge pressure and applying superheated solvent vapor to the filter while maintaining the negative gauge pressure. The filter can be heated prior to being subjected to the negative gauge pressure. The superheated vapor may be composed of the same compounds as impurities being removed from the filter. The filter may be an activated carbon filter.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 20, 1997
    Inventors: Donald J. Gray, Peter T. E. Gebhard, III
  • 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