Patents by Inventor Clyde D. Sprague

Clyde D. Sprague 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).

  • Retainable closure
    Patent number: 4437594
    Abstract: A retainable closure for selectively atmospherically isolating a passageway in a fitting wherein the passageway terminates in an orifice. The closure comprises a retainer connected to the fitting. An elongate elastic cover is secured to the retainer. The cover is selectively positionable between a first position wherein the cover engages the orifice so as to atmospherically isolate the passageway, and a second position wherein the cover is disengaged from the orifice so as to allow unobstructed passage therepast.
    Type: Grant
    Filed: December 10, 1981
    Date of Patent: March 20, 1984
    Assignee: Nordson Corporation
    Inventor: Clyde D. Sprague