Patents by Inventor Charles E. Grigg

Charles E. Grigg 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).

  • Expandable ashtray
    Patent number: 4312346
    Abstract: An ashtray in which ashes and burned cigarettes are stored in an enclosed compartment for safety against fires and to prevent the resulting smells from spreading. The ashtray can be made larger or smaller depending upon the need for storage.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: January 26, 1982
    Inventor: Charles E. Grigg