Patents by Inventor Donald John Barclay

Donald John Barclay 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).

  • Liquid electrolyte type electrochromic display device
    Patent number: 4092637
    Abstract: An electrochromic display device having first and second electrodes, and a plurality of display electrodes, all immersed in a liquid electrolyte. Drive means act to first generate a potential difference between said first and second electrodes to cause a color species to be deposited on said first electrode and, thereafter, act to generate a potential difference between said first electrode and selected ones of said plurality of display electrodes to cause the color species to be transferred to the selected ones of said plurality of display electrodes. Heptyl viologen dibromide is suggested as one possible electrolyte.
    Type: Grant
    Filed: May 5, 1976
    Date of Patent: May 30, 1978
    Assignee: International Business Machines Corporation
    Inventors: Donald John Barclay, Colin Leonard Bird, Michael Henry Hallett, David Horrobin Kirkman, John Francis Minshull, Charles Edward Owen
  • Electrodeposition of chromium
    Patent number: 4062737
    Abstract: Chromium containing deposits free of cracks and having good hardness are plated by the use of a novel aqueous chromium (III) electrolyte. The electrolyte includes an aquo chromium (III)-thiocyanato complex as a source of chromium (III) cations.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: December 13, 1977
    Assignee: International Business Machines Corporation
    Inventors: Donald John Barclay, William Morris Morgan