Patents by Inventor Christopher R. S. Needes

Christopher R. S. Needes 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).

  • Patent number: 4255291
    Abstract: Air-fireable thick film conductor compositions are provided. The conductor composition is a paste containing (1) an inorganic powder made from an intermetallic phase copper-aluminum powder, aluminum powder and a glass frit and (2) an inert organic liquid vehicle.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: March 10, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Christopher R. S. Needes, Joseph R. Rellick
  • Patent number: 4251344
    Abstract: An improved electrode having a surface mixture of nickel and porous nickel produced by applying a paste mixture of NiAl.sub.2 and Ni.sub.3 B together with a vehicle to a substrate. After burning off the vehicle and firing in air at a temperature of 450.degree. to 650.degree. C. and thereafter sintering at a temperature of 800.degree. to 900.degree. C. in nitrogen, the coating on the substrate contains Ni.sub.2 Al.sub.3, NiAl.sub.2 B and nickel together with a thin overlayer of B.sub.2 O.sub.3. After removing the intermetallic aluminum, boron and boron oxide by dissolution with sodium hydroxide, the surface of the substrate contains Raney nickel supported on a structure of nickel. The resulting electrodes can be used as cathodes in water or brine electrolysis cells.
    Type: Grant
    Filed: January 22, 1980
    Date of Patent: February 17, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Christopher R. S. Needes
  • Patent number: 4235644
    Abstract: Thick film conductor compositions containing silver powder and lead bismuthate glass frit powder and an organic vehicle/solvent system are presented for use as grid metallizations to the n-type layers of n- on p- silicon solar cells.
    Type: Grant
    Filed: August 31, 1979
    Date of Patent: November 25, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Christopher R. S. Needes
  • Patent number: 4169025
    Abstract: A process for making an electrode having a Raney nickel surface layer of thickness greater than 75 microns and an average porosity of at least 11%, comprising interdiffusing aluminum and nickel on a conductive metal core at a temperature of at least 660.degree. C. to form a nickel-aluminum alloy layer on the core from which layer aluminum is selectively dissolved. When used as a cathode in an electrolytic cell for producing hydrogen, chlorine and caustic from brine, the electrode exhibits low hydrogen overvoltage.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: September 25, 1979
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Christopher R. S. Needes