Patents by Inventor Ralph D. Zingle

Ralph D. Zingle 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).

  • Vented vial stopper for processing freeze-dried products
    Patent number: 5596814
    Abstract: An vented vial stopper for use in processing freeze-dried products is provided. The stopper includes a vent passageway that is covered with a waterproof and moisture vapor permeable membrane to allow the venting of moisture during the freeze-drying process. The membrane also extends to cover most or all of the exposed surface of the stopper to protect the stopper from chemical attack during processing.
    Type: Grant
    Filed: November 6, 1995
    Date of Patent: January 28, 1997
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Ralph D. Zingle, Nelson A. George
  • Dispersant delivery system and method for producing and using same
    Patent number: 5497942
    Abstract: An improved apparatus and method for the delivery of various dispersants to a surrounding environment is disclosed. The apparatus comprises a composite membrane which is resistant to wetting by low surface tension dispersant emitting substances and provides an essentially uniform rate of release of dispersant into the environment. Previous problems of inconsistent dispersant release and apparatus leakage are avoided and a more durable, compact, and reliable dispersant delivery system is provided.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: March 12, 1996
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Ralph D. Zingle, Mary W. Tilley, William L. Mead
  • Smoke filter
    Patent number: 5108474
    Abstract: A smoke filter which is useful in containing smoke produced during electrosurgery or laser surgery procedures which has a prefilter layer to contain most of the smoke produced in these surgical procedures and to extend the useful life of the smoke filter, a microporous polymeric membrane layer which acts as a final filtering layer of the smoke filter and disposed between these two layers is a protective foam layer which protects the integrity of the microporous polymeric membrane from damage caused by the prefilter layer.
    Type: Grant
    Filed: January 3, 1991
    Date of Patent: April 28, 1992
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: James A. Riedy, Ralph D. Zingle
  • Lyophilization container
    Patent number: D425205
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: May 16, 2000
    Assignee: Gore Enterprise Holdings, Inc.
    Inventors: Lawrence F. X. Henigan, Brian Huebner, Meagan L. Mizenko, Edward M. Szczygiel, Ralph D. Zingle, Kenneth S. Zukor
  • Lyophilization container
    Patent number: D430939
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: September 12, 2000
    Assignee: Gore Enterprise Holdings, Inc.
    Inventors: Kenneth S. Zukor, Ralph D. Zingle, Edward M. Szczygiel, Meagan L. Mizenko, Brian Huebner, Lawrence F. X. Henigan