Patents by Inventor Benemon Wu

Benemon Wu 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).

  • Vacuum container
    Patent number: 5651470
    Abstract: A vacuum container has a vessel and an installed air extraction device covering the vessel. The installed air extraction device has a cap, an air extraction device disposed in the cap, and an air inlet valve passing through a center of the cap. The cap has an inner cover, an outer cover, and a hollow interior defined between the inner cover and the outer cover. An inner sleeve extends downward from the center portion of the outer cover. A spring encloses the middle portion of the air inlet valve. Another spring encloses the inner sleeve.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: July 29, 1997
    Inventor: Benemon Wu