Patents by Inventor Stuart E. Tarkan

Stuart E. Tarkan 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).

  • Patent number: 4194910
    Abstract: P/M products are provided having improved resistance to wear and abrasion by adding controlled amounts of pre-alloyed refractory carbide material to metal powders selected from the group consisting of iron-base, nickel-base, aluminum-base, copper-base and beryllium-base powders following which the mixed powders are compacted and sintered to the desired shape.
    Type: Grant
    Filed: June 23, 1978
    Date of Patent: March 25, 1980
    Assignee: Chromalloy American Corporation
    Inventors: M. Kumar Mal, Stuart E. Tarkan
  • Patent number: 4174967
    Abstract: A sintered titanium carbide tool steel composition is provided comprising by weight about 15% to 40% primary grains of titanium carbide dispersed through a steel matrix making up the balance, the composition of said steel matrix consisting essentially by weight of about 3% to 7% chromium, about 2% to 6% molybdenum, about 2% to 8% nickel, about 0.2% to 0.6% carbon and the balance essentially iron.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: November 20, 1979
    Assignee: Chromalloy American Corporation
    Inventors: M. Kumar Mal, Stuart E. Tarkan
  • Patent number: 4173471
    Abstract: Relates to a sintered age-hardenable titanium carbide tool steel comprising by volume about 15% to 50% primary grains of titanium carbide dispersed through a high cobalt-containing steel matrix making up the balance, said matrix consisting essentially by weight of about 10% to 25% cobalt, about 5% to 20% chromium, about 0.5% to 5% molybdenum, 0 to 2% nickel, 0 to 0.15% carbon and essentially the balance at least about 50% iron.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: November 6, 1979
    Assignee: Chromalloy American Corporation
    Inventors: M. Kumar Mal, Stuart E. Tarkan
  • Patent number: 3977837
    Abstract: A sintered steel-bonded titanium carbide composition characterized by an improved combination of physical and anti-friction properties is provided comprising about 15 to 60% by weight of primary grains of titanium carbide dispersed through a steel matrix making up essentially the balance, the steel matrix being characterized metallographically by an austenitic decomposition product and containing a small but effective amount of misch metal ranging from about 0.1 to 1.25% by weight of said matrix sufficient to effect a substantial improvement in said properties.
    Type: Grant
    Filed: November 6, 1973
    Date of Patent: August 31, 1976
    Assignee: Chromalloy American Corporation
    Inventors: M. Kumar Mal, Stuart E. Tarkan
  • Patent number: 3966423
    Abstract: A sintered steel-bonded titanium carbide composition characterized by an improved combination of physical and anti-friction properties is provided comprising about 15% to 60% by weight of primary grains of titanium carbide dispersed through a steel matrix making up essentially the balance, the steel matrix being characterized metallographically by an austenitic decomposition product, said steel-bonded titanium carbide composition containing an effective amount of a grain-growth inhibitor ranging by weight from about 0.25% to 2% of a columbium-group carbide.
    Type: Grant
    Filed: November 6, 1973
    Date of Patent: June 29, 1976
    Inventors: M. Kumar Mal, Stuart E. Tarkan