Patents by Inventor David J. Mazey

David J. Mazey 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).

  • Growth of synthetic diamonds having altered electrical conductivity
    Patent number: 4277293
    Abstract: A method of growing a diamond crystal which comprises bombarding the diamond with a flux of carbon ions of sufficient energy to penetrate the diamond crystal and cause crystal growth which is at least predominantly internal, the temperature of the crystal being at least 400.degree. C. and less than the graphitization temperature, such that the diamond crystal structure is maintained during growth.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: July 7, 1981
    Inventors: Richard S. Nelson, John A. Hudson, David J. Mazey
  • Growth of synthetic diamonds
    Patent number: 4191735
    Abstract: A method of growing a diamond crystal which comprises bombarding the diamond with a flux of carbon ions of sufficient energy to penetrate the diamond crystal and cause crystal growth which is at least predominantly internal, the temperature of the crystal being at least 400.degree. C. and less than the graphitisation temperature, such that the diamond crystal structure is maintained during growth.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: March 4, 1980
    Assignee: National Research Development Corporation
    Inventors: Richard S. Nelson, John A. Hudson, David J. Mazey
  • Radiation toughening of diamonds
    Patent number: 4184079
    Abstract: A diamond is toughened by bombarding it at elevated temperature with ions such as protons which form a dislocation network in it, inhibiting microcleavage.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: January 15, 1980
    Assignee: National Research Development Corporation
    Inventors: John A. Hudson, David J. Mazey, Richard S. Nelson