Patents by Inventor Francis J. Ross

Francis J. Ross 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).

  • Dome cap for fused salt electrolytic cell
    Patent number: 4376028
    Abstract: A cap for the access port of the dome of a fused salt electrolytic cell comprising a circular cap body (1) having an outer flange (2) and a sealing surface (3) on its bottom, attached to the sealing surface an inner ring (4) concentric with the outer flange and with the flange defining a circular groove (5) within which the top of an access port (6) fits, within the groove a resilient refractory packing (7) that provides a seal between the top of the access port and the sealing surface.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: March 8, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Richard D. Marczewski, Francis J. Ross
  • Limiting production of an electrolytic alkali metal cell
    Patent number: 4306948
    Abstract: The production of an electrolytic alkali-metal cell can be temporarily curtailed by adding sodium-, calcium- or barium sulfate to the cell and reducing the current flow.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: December 22, 1981
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Francis J. Ross
  • Agitator for an electrolytic sodium cell receiver
    Patent number: 4305671
    Abstract: An apparatus for agitating the contents of an electrolytic sodium cell receiver, which apparatus comprises(a) an agitator having a blade portion and a shank portion, the blade portion being fitted within the receiver housing and having three blades extending horizontally and laterally and spaced at about 120.degree. intervals, and the shank portion extending upward out of the receiver housing, and(b) means for imparting reciprocating rotary motion to the agitator.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: December 15, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Francis J. Ross
  • Preparation of alkali metals
    Patent number: 4139428
    Abstract: The electrolytic production of an alkali metal, such as sodium, from a conventional Downs cell can be reduced by the addition to the fused alkali metal salt electrolyte of small amounts of anhydrous aluminum oxide or magnesium oxide, preferably aluminum oxide. Production can be recovered by the removal of either the aluminum or magnesium metal values from the cell.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: February 13, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert J. Dean, Francis J. Ross