Patents by Inventor William A. Barnstead

William A. Barnstead 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).

  • Pressure sterilizer
    Patent number: 6036928
    Abstract: A sterilizing machine facilitates the introduction of a bath liquid into empty crevasses in the article to be sterilized by evacuating a chamber holding the article to be sterilized prior to covering the article with a bath of liquid. The sterilizer equipment also applies a high pressure to the article to enhance killing of organisms contained therein.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: March 14, 2000
    Inventor: William A Barnstead
  • Sterilizer with sterile discharge
    Patent number: 5976474
    Abstract: A sterilizing machines for decontaminating articles of dangerous biological material features an arrangement whereby all of the gas discharged from the sterilizer chamber during a sterilization cycle passes through a removable filter situated within the sterilization chamber.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: November 2, 1999
    Inventor: William A. Barnstead