Patents by Inventor Paul Hammond Drake

Paul Hammond Drake 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).

  • Storage tank seal
    Patent number: 4079856
    Abstract: Liquid storage tank uses a collapsible bag of impermeable material which floats on the stored liquid and moves with the liquid, thus giving reduced vapor pressure above the liquid. In use, the collapsible bag has a tapered form so as to reduce the possibility of its contact with the tank side walls and hence reduce the sticking tendency of the bag to the walls.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: March 21, 1978
    Assignee: The British Petroleum Company Limited
    Inventor: Paul Hammond Drake