Patents by Inventor Frank E. Parsen

Frank E. Parsen 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).

  • Cell corrosion reduction
    Patent number: 4840644
    Abstract: Corrosion is reduced in aqueous electrochemical cells having zinc anodes comprised of single crystal zinc particles by the addition of small amounts of a gas inhibiting surfactant, for example, an organic phosphate inhibitor such as RA600 from GAF Corp. to the cell. A synergistically lowered rate of corrosion and cell gassing is obtained even with reduction of mercury content.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: June 20, 1989
    Assignee: Duracell Inc.
    Inventors: Purush Chalilpoyil, Frank E. Parsen, Chih-Chung Wang
  • Cell corrosion reduction
    Patent number: 4777100
    Abstract: Corrosion is reduced in aqueous electrochemical cells having zinc anodes comprised of single crystal zinc particles by the addition of small amounts of a gas inhibiting surfactant, for example, an organic phosphate inhibitor such as RA600 from GAF Corp. to the cell. A synergistically lowered rate of corrosion and cell gassing is obtained even with reduction of mercury content.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: October 11, 1988
    Assignee: Duracell Inc.
    Inventors: Purush Chalilpoyil, Frank E. Parsen, Chih-Chung Wang
  • Cell corrosion reduction
    Patent number: 4585716
    Abstract: Corrosion is reduced in aqueous electrochemical cells having zinc anodes by utilizing mercury amalgamated discrete single crystal zinc particles to which small amounts of one or more of indium, thallium, gallium, bismuth, cadmium, tin and lead have been added or prealloyed with the zinc, prior to formation of the single crystal particles. A synergistically lowered rate of corrosion and cell gassing is obtained even with reduction of mercury content.
    Type: Grant
    Filed: August 12, 1985
    Date of Patent: April 29, 1986
    Assignee: Duracell Inc.
    Inventors: Purush Chalilpoyil, Jesse R. Rea, Frank E. Parsen, Chih-Chung Wang
  • Corrosion and hydrogen evolution inhibitors for current-producing cells having zinc anodes
    Patent number: 4377625
    Abstract: Corrosion and hydrogen evolution in a current-producing cell possessing a predominantly zinc anode and an aqueous alkaline or acidic electrolyte is significantly inhibited by the addition to said cell of a zinc corrosion and hydrogen evolution-inhibiting amount of at least one chelating agent selected from the group consisting of aminocarboxylic acid, polyamine and aminoalcohol.
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: March 22, 1983
    Assignee: Duracell Inc.
    Inventors: Frank E. Parsen, Eleanor J. Rossler
  • Electrochemical cells having hydrogen gas absorbing agent
    Patent number: 4350745
    Abstract: An agent which absorbs hydrogen gas for electrochemical cells is made from an oxide of manganese and nickel, cobalt or iron. At temperatures above about 40.degree. C., the oxide of manganese can be replaced by lead oxide. Hydrophobic binders can be added to the agent or the agent can be microencapsulated in water-impermeable but hydrogen-gas-permeable materials. The agent is preferably added to the cell in the form of small agglomerates or microcapsules.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: September 21, 1982
    Assignee: Duracell Inc.
    Inventors: Frank E. Parsen, Thomas T. Yatabe
  • Cell having a gelled anode containing a polyhydric alcohol
    Patent number: 4332870
    Abstract: A method for forming a gelled anode in which a powdered anode metal is mixed with means for maintaining a uniform mixture of the powdered metal and a gelling agent, the gelling agent is added, and the mixture is fed into an aqueous electrolyte in the cell whereupon a gel is formed in situ.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: June 1, 1982
    Assignee: Duracell International Inc.
    Inventors: Frank E. Parsen, Teresita O. Graham
  • Method of forming in situ gelled anode
    Patent number: 4288913
    Abstract: A method for forming a gelled anode in which a powdered anode metal is mixed with means for maintaining a uniform mixture of the powdered metal and a gelling agent, the gelling agent is added, and the mixture is fed into an aqueous electrolyte in the cell whereupon a gel is formed in situ.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: September 15, 1981
    Assignee: Duracell International Inc.
    Inventors: Frank E. Parsen, Teresita O. Graham