Patents by Inventor Harlan B. Johnson

Harlan B. Johnson 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).

  • Electrolytic anode
    Patent number: 4007107
    Abstract: Disclosed is an electrode having an electroconductive substrate and an electroconductive layer on the substrate. The electroconductive layer is an intermetallic compound of a platinum group metal and a transition metal. Also disclosed is a method of electrolyzing brine, such as sodium chloride brine, where the brine is fed to an electrolytic cell having an anode and a cathode, an electrical current is passed from the anode to the cathode, and chlorine is evolved at the anode, which anode has an electroconductive substrate with an electroconductive layer thereon formed by an intermetallic compound of a platinum group metal and a transition metal. The electroconductive layer may either be an intermediate layer with a further layer of a catalytic material, as an electrocatalytic material or surface catalytic material, or it may be the catalytic material itself.
    Type: Grant
    Filed: October 18, 1974
    Date of Patent: February 8, 1977
    Assignee: PPG Industries, Inc.
    Inventor: Harlan B. Johnson
  • Method of electrolysis
    Patent number: 3990957
    Abstract: Disclosed is a method of electrolyzing an aqueous alkali metal chloride, which method comprises passing an electrolytic current from an anode of an electrolytic cell through an alkali metal chloride electrolyte to a cathode of the cell, evolving chlorine at the anode and hydrogen at the cathode. The method is characterized by the use of a cathode having a layer of an oxy-compound of a platinum group metal and an alkaline earth metal on an electroconductive cathode substrate.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: November 9, 1976
    Assignee: PPG Industries, Inc.
    Inventors: Howard H. Hoekje, Harlan B. Johnson, Ronald D. Chamberlin
  • Electrodes having silicide surface
    Patent number: 3963593
    Abstract: An electrode is disclosed having an electroconductive silicide surface on a suitable electroconductive substrate. The silicide surface is electroconductive and electrocatalytic. Also disclosed is an electrolytic cell containing an anode having a silicide surface on a suitable electroconductive substrate and an electrolytic process for the electrolysis of brines by the use of such an anode.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: June 15, 1976
    Assignee: PPG Industries, Inc.
    Inventor: Harlan B. Johnson
  • Method of mounting silicon anodes in a chlor-alkali cell
    Patent number: 3958741
    Abstract: Disclosed is a method of mounting a silicon member intended for use as an anode in the lead base of a chlor-alkali electrolytic cell. According to this invention, the amount of molten lead provided on the cell base in contact with the stem or base of the anode is low enough to avoid subjecting the silicon member to excessive thermal stresses.
    Type: Grant
    Filed: March 4, 1974
    Date of Patent: May 25, 1976
    Assignee: PPG Industries, Inc.
    Inventors: Harlan B. Johnson, Cletus N. Welch, Aleksandrs Martinsons