Patents by Inventor John Drypen

John Drypen 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).

  • Metering syringe
    Patent number: 5318544
    Abstract: A syringe for metering fluid in which a plunger contains a plurality of stop surfaces which contact a stop on a syringe tube. The stop surfaces are linearly displaced from each other along a longitudinal axis of the plunger by distances corresponding to predetermined volumes of fluid to be metered. The stop surfaces are also angularly displaced about the longitudinal axis of the plunger so that incremental rotation of the plunger permits successive stop surfaces to limit plunger motion, thereby effecting a precise metering of the fluid.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: June 7, 1994
    Assignee: Kerr Manufacturing Company
    Inventors: John Drypen, Charles E. Steele