Patents by Inventor Edward Wittman

Edward Wittman 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).

  • Patent number: 5102249
    Abstract: A lipstick dispenser having a propel/retract mechanism that permits shaped pomades and shaped outer casings, without requiring excessive length to accommodate the mechanism, comprises a base, a helical spring affixed to and extending from the base, a sleeve fitted over the helical spring and having an engaged end which is rotably affixed to the base, and an elevator cup fitted into the sleeve and having an extending stem with a threaded portion for engaging with the helical spring. Relative rotation of the spring and the threaded portion caused by rotation of the base and sleeve causes axial movement of the elevator cup. During retraction of the elevator cup, the spring accumulates and is compressed in the zone of the stem between the cup and the threaded portion of the elevator cup.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: April 7, 1992
    Assignee: Risdon Corporation
    Inventors: Thomas F. Holloway, Walter Ackermann, James Bigham, Edward Wittman