Patents by Inventor Pasupathy Ganesan

Pasupathy Ganesan 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).

  • Strengthenable ethylene pyrolysis alloy
    Patent number: 5873950
    Abstract: There is provided a nickel-base alloy with service enhanced strengthening properties. When exposed to ethylene pyrolysis conditions, namely a carbon containing environment and at temperatures of at least about 900.degree. C., the alloy forms M.sub.6 C and MC carbides that strengthen the alloy. The alloy may be formed into internally finned tubing.The alloy includes about 0.08-0.11% carbon, 41-45% nickel, 23-26% chromium, 0.6-0.95% manganese, 1-1.7% silicon, 0.2-0.6% titanium, 0.25-0.55% aluminum, 1.3-1.7% molybdenum, 0.25-0.6% niobium, 0.15-0.45% tantalum, 0-0.2% tungsten, 0.001-0.005% boron, 0.01-0.03% zirconium, and the balance iron with trace commercial impurities.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: February 23, 1999
    Assignee: Inco Alloys International, Inc.
    Inventors: Pasupathy Ganesan, Gaylord Darrell Smith, Charles R. Conder
  • Nickel-base alloy with superior stress rupture strength and grain size control
    Patent number: 5372662
    Abstract: A nickel-chromium-molybdenum-cobalt alloy has additions of tantalum and tungsten to provide superior stress rupture strength in the presence of grain size control agents, and has the following composition:______________________________________ Carbon 0.04-0.15 Iron 0-8 Chromium 18-25 Cobalt 10-15 Molybdenum 5-9 Aluminum 0.7-1.5 Tungsten 0-5 Titanium 0-0.5 Tantalum 0.7-2.5 Manganese 0-1 Silicon 0.05-0.75 Zirconium 0.01-0.05 Boron 0-0.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: December 13, 1994
    Assignee: Inco Alloys International, Inc.
    Inventors: Pasupathy Ganesan, Gaylord D. Smith
  • Nickel-base alloy
    Patent number: 5017249
    Abstract: A nickel-chromium alloy exhibiting enhanced stress rupture strength and grain size stability at elevated temperatures up to about 1260.degree. (2300.degree. F.) due to the affirmative formation of M.sub.6 C carbide within the alloy. The alloy is especially useful for turbine and engine applications.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: May 21, 1991
    Assignee: Inco Alloys International, Inc.
    Inventors: Gaylord D. Smith, Curtis S. Tassen, Pasupathy Ganesan, Jack M. Wheeler
  • Heat treatment method for reducing polythionic acid stress corrosion cracking
    Patent number: 4969964
    Abstract: A heat treatment of alloy 617 generally including 732.degree. C.-927.degree. C. (1350.degree. F.-1700.degree. F.) for about one hour. The resultant discontinuous carbide network in the grain boundaries inhibits stress corrosion crack growth in polythionic acid environments.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: November 13, 1990
    Assignee: Inco Alloys International, Inc.
    Inventors: James R. Crum, William G. Lipscomb, Pasupathy Ganesan
  • Nickel-base alloy
    Patent number: 4877461
    Abstract: The stress-rupture strength of a nickel-chromium-molybdenum-cobalt alloy is enhanced by reason of a special morphological microsctructure which in terms of carbides present is characterized by a predominant amount of the M.sub.6 C carbide.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: October 31, 1989
    Assignee: Inco Alloys International, Inc.
    Inventors: Gaylord D. Smith, Curtis S. Tassen, Pasupathy Ganesan, Jack M. Wheeler
  • High nickel chromium alloy
    Patent number: 4784830
    Abstract: An oxidation resistant nickel-chromium based alloy possessing good stress rupture characteristics at elevated temperature and, in addition to nickel and chromium, containing correlated percentages of aluminum, titanium, nitrogen, carbon, etc.
    Type: Grant
    Filed: June 8, 1987
    Date of Patent: November 15, 1988
    Assignee: Inco Alloys International, Inc.
    Inventors: Pasupathy Ganesan, Gaylord D. Smith, Curtis S. Tassen, Jack M. Wheeler
  • Heat treated alloy
    Patent number: 4750950
    Abstract: A process for heat treating alloy objects which comprises solution treating a nickel-base alloy containing chromium, molybdenum, copper, titanium, aluminum and iron at a temperature in excess of 955.degree. C. and then aging the alloy without intervening cold work at a temperature in the range of 700.degree. C. to 720.degree. C. This treatment provides non-cold worked structure which is tough, not susceptible to stress corrosion cracking in a test environment simulating a sour gas well environment and which exhibits high level of fracture energy in a slow strain rate tensile test in that environment.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: June 14, 1988
    Assignee: Inco Alloys International, Inc.
    Inventors: Edward F. Clatworthy, Pasupathy Ganesan, Jerry A. Harris