Patents by Inventor William H. L. Hopper

William H. L. Hopper 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).

  • Stop-weld composition and the method of using it
    Patent number: 3981753
    Abstract: A novel stop-weld composition comprises a mixture of a stop-weld material and a compound capable of dissociating into a solid and a gas at temperatures below the melting point of the metal being processed. Sheet metal panels are imprinted with the novel stop-weld composition, rollbonded and heated to a temperature sufficient to dissociate the compound and inflate the metal panels in the imprinted areas.
    Type: Grant
    Filed: June 26, 1970
    Date of Patent: September 21, 1976
    Assignee: Kennecott Copper Corporation
    Inventor: William H. L. Hopper