Patents by Inventor Derek F. Croxall

Derek F. Croxall 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).

  • Process for growing crystals
    Patent number: 4381214
    Abstract: According to this invention a process for forming a crystal of a substance comprises securing surfaces of two crystals (1) together with the axes of the crystals aligned and depositing said substance onto the joined crystals thereby causing them to grow into a single crystal substantially or entirely surrounding the registering regions (2) of said surfaces.A resultant crystal may be sectioned to provide large, single crystals (3) not containing a bonded region.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: April 26, 1983
    Assignee: The General Electric Company Limited
    Inventors: Ian R. A. Christie, Derek F. Croxall, Brian J. Isherwood