Patents Assigned to Praxair S.T. Technology, Inc.
  • Non-stoichiometric titanium nitride coating
    Patent number: 5185211
    Abstract: A wear and erosion resistant coating for substrates having a non-nitrogen titanium-containing outer surface onto which a non-stoichiometric titanium nitride coating is deposited in which the nitrogen content in the titanium nitride coating is from 32.5 to 47 atomic weight percent.
    Type: Grant
    Filed: July 11, 1991
    Date of Patent: February 9, 1993
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Jiinjen A. Sue, Harden H. Troue
  • Boron nitride boat and process for producing it
    Patent number: 5182149
    Abstract: A pyrolytic boron nitride boat having a cavity suitable for use in growing and doping semi-conductor crystals such as gallium arsenide and said cavity having a roughened surface formed of substantially uniform projected no nodules, disturbances, or ridges.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: January 26, 1993
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Robert L. Finicle
  • Boron nitride crucible
    Patent number: 5158750
    Abstract: A boron nitride crucible having a closed end, an open end, an internal surface and an external surface, and wherein at least a portion of the external surface, preferably proximate the open end of the crucible, has a duplex coating comprising an undercoat of pyrolytic graphite and a top coat of pyrolytic boron nitride. A process for making the boron nitride crucible is also disclosed.
    Type: Grant
    Filed: August 27, 1991
    Date of Patent: October 27, 1992
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Robert L. Finicle