Patents by Inventor Grant Lu

Grant Lu 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).

  • Method of making white diamond film
    Patent number: 5976206
    Abstract: Diamond film with substantially no non-diamond carbon and a high thermal conductivity is deposited by means of a direct current arc jet apparatus with a substrate temperature below about 975 degrees Celsius, an arc power of between about 20 and 40 kw. A pressure of about 12 torr, and an enthalpy greater than 30 from a activated gas jet fed with hydrogen and methane, the methane being supplied at a concentration of less than 0.07%. The resulting material has a high transparency and thermal conductivity.Also disclosed is the use of the diamond material made by the present method for cutting tool applications, particularly milling.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: November 2, 1999
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corporation
    Inventors: Louis K. Bigelow, Kevin J. Gray, Grant Lu, Matthew A. Simpson, Gordon L. Cann
  • CVD diamond radiation detector
    Patent number: 5773830
    Abstract: The process is an arc jet CVD diamond deposition process with very low methane, less than 0.07%, and the addition of water. The resulting material has is characterized by a narrow Raman peak, a relatively large lattice constant, and a charge carrier collection distance of at least 25 microns.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: June 30, 1998
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corp.
    Inventors: Grant Lu, Gordon L. Cann
  • Method of making white diamond film
    Patent number: 5736252
    Abstract: Diamond film with substantially no non-diamond carbon and a high thermal conductivity is deposited by means of a direct current arc jet apparatus with a substrate temperature below about 975 degrees Celsius, an arc power of between about 20 and 40 kw. a pressure of about 12 torr, and an enthalpy greater than 30 from a activated gas jet fed with hydrogen and methane, the methane being supplied at a concentration of less than 0.07%. The resulting material has a high transparency and thermal conductivity.Also disclosed is the use of the diamond material made by the present method for cutting tool applications, particularly milling.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: April 7, 1998
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corp.
    Inventors: Louis K. Bigelow, Kevin J. Gray, Grant Lu, Matthew A. Simpson, Gordon L. Cann
  • CVD diamond radiation detector
    Patent number: 5672430
    Abstract: The process is an arc jet CVD diamond deposition process with very low methane, less than 0.07%, and the addition of water. The resulting material has is characterized by a narrow Raman peak, a relatively large lattice constant, and a charge carrier collection distance of at least 25 microns.Also disclosed is a particle detector device which makes use of the diamond material according to the invention.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: September 30, 1997
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corp.
    Inventors: Grant Lu, Gordon L. Cann
  • Large fluoride glass preform fabrication
    Patent number: H1259
    Abstract: A process for producing long length fluoride glass preforms, by producing a fluoride glass rod of core glass, overcoating the core glass rod with fluoride cladding glass to form a core/clad unit, and overcoating the core/clad unit with an oxide glass overclad.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: December 7, 1993
    Inventors: Ishwar D. Aggarwal, Daniel Brower, Grant Lu