Patents by Inventor Ralph M. Onstenk

Ralph M. Onstenk 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).

  • Container and cover fastening means
    Patent number: 4674650
    Abstract: A plastic container with an inverted V-shaped rim at the upper edge of its body. The rim configuration makes it easy to pour contents from the container and, after pouring, any material remaining on the rim will slide off. A cover with a V-shaped flange mates with the rim which holds it out of contact with the inner and outer surface of the body wall. The cover also has a pocket containing a sealing ring which is passed against the rim by a locking strap to seal the container.
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: June 23, 1987
    Assignees: E. I. Du Pont de Nemours and Company, Wavin B. V.
    Inventors: Edward H. Hamilton, Ralph M. Onstenk, Bernardus A. Lesscher
  • Drum
    Patent number: D298379
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: November 1, 1988
    Assignee: Wavin B.V.
    Inventors: Bernardus A. Lesscher, Edward H. Hamilton, Ralph M. Onstenk