Patents by Inventor David L. Lewis

David L. Lewis 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).

  • Transition metal oxide electrodes
    Patent number: 4208450
    Abstract: Disclosed is an electrode for use in electrochemical processes wherein a metal substrate made of a valve metal such as titanium carries a semi-conducting intermediate coating consisting of a combination of tin and antimony oxides laid down upon the valve metal substrate in a series of layers and a top coating consisting of an oxide selected from the group of chromium, manganese, iron, cobalt, nickel, molybdenum or tungsten applied in a series of layers.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: June 17, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: David L. Lewis, Barry A. Schenker, Mary R. Suchanski, C. Richard Franks, deceased
  • Transition metal oxide electrodes
    Patent number: 4125449
    Abstract: Disclosed is an electrode for use in electrochemical processes wherein a metal substrate made of a valve metal such as titanium carries a semi-conducting intermediate coating consisting of a combination of tin and antimony oxides laid down upon the valve metal substrate in a series of layers and a top coating consisting of an oxide selected from the group of chromium, manganese, iron, cobalt, nickel, molybdenum or tungsten applied in a series of layers.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: November 14, 1978
    Assignee: Diamond Shamrock Corporation
    Inventors: David L. Lewis, Larry A. Schenke, Mary R. Suchanski, C. Richard Franks, deceased
  • Manganese dioxide electrode
    Patent number: 4028215
    Abstract: Disclosed is an electrode for use in electrochemical processes especially electrowinning processes wherein a metal substrate made of a valve metal such as titanium carries a semiconducting intermediate coating consisting of a combination of tin and antimony oxides laid down upon the valve metal substrate in a series of layers and a top coating consisting of manganese dioxide applied in a series of layers.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: June 7, 1977
    Assignee: Diamond Shamrock Corporation
    Inventors: David L. Lewis, C. Richard Franks, Barry A. Schenker