Patents by Inventor William R. D. Couper

William R. D. Couper 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).

  • Method of removing dross from a lead refining pot
    Patent number: 4460166
    Abstract: Dross is removed from molten lead during its refining by scraping the dross by means of a rake up a ramp fitted to the rim of the refining pot, a baffle being placed to trap dross in front of the ramp. The rake may be operated manually or by means of a power operated device.
    Type: Grant
    Filed: February 4, 1983
    Date of Patent: July 17, 1984
    Assignee: Associated Lead Manufacturers Ltd.
    Inventors: Duncan Ritchie, John R. Mills, William R. D. Couper