Patents by Inventor Ralph E. Pfister

Ralph E. Pfister 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).

  • Glass container
    Patent number: 4882210
    Abstract: A container for use with a closure and a glass container having an access opening for a closure. The container was a crush strength increasing polyparaxylylene coating on at least one side of the glass container at a thickness of at least 0.1 microns to give at least 40% increased crush strength.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: November 21, 1989
    Assignee: The West Company
    Inventors: Val G. Romberg, Patty H. Kiang, Wayne T. Curry, Ralph E. Pfister
  • Hypoallergenic jewelry and method of making the same
    Patent number: 4861658
    Abstract: Hypoallergenic jewelry and a method of making the same is achieved by providing vapor deposition of unsubstituted and substituted linear homopolymers and copolymers of poly(p-xylylene) on the jewelry having a thickness in the range of about 0.5 microns to about 25 microns. A new use of preventing allergic reactions when jewelry is worn is achieved by providing the jewelry with a poly(p-xylylene) polymer coating which provides a hypoallergenic surface on the jewelry.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: August 29, 1989
    Assignee: Barriergen, Inc.
    Inventors: Donald L. Griffin, Ralph E. Pfister