Patents by Inventor Charles Joseph Walworth

Charles Joseph Walworth 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).

  • Rising-plug plug valve
    Patent number: 3948284
    Abstract: In a rising-plug plug valve wherein the plug and valve body at the narrow end of the plug define a cavity, a passage is provided between the cavity and the outlet opening of the plug valve. On opening, the valve plug and seat portion adjacent the narrowest portion of the plug is flushed by liquid passing therebetween and the outlet opening of the passageway.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: April 6, 1976
    Assignee: The Dow Chemical Company
    Inventor: Charles Joseph Walworth