Patents by Inventor Thomas M. Pack

Thomas M. Pack 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).

  • Pre-filled plastic syringes and containers and method of terminal sterilization thereof
    Patent number: 5256154
    Abstract: Disclosed is a pre-filled plastic syringe containing a liquid product for terminal sterilization comprising: a syringe barrel equipped with a one-way valve and a slidable plunger to equalize pressure differentials; a filter engaging the one way valve to prevent backward migration of viruses and bacteria; an end cap covering the open end of the barrel to maintain sterility; and an end cap restraining device to prevent plunger blow-out.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: October 26, 1993
    Assignee: Sterling Winthrop, Inc.
    Inventors: Richard T. Liebert, Neil H. Brown, Randy E. Armbruster, Thomas M. Pack