Patents by Inventor Sunil Widge

Sunil Widge 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: 5556594
    Abstract: An age hardenable nickel base chromium, molybdenum, alloy as well as intermediate products and articles made therefrom are disclosed which, in the solution treated and age hardened condition, have a 0.2% yield strength greater than 100 ksi combined with resistance to pitting and crevice corrosion and to stress corrosion cracking in chloride and sulfide environments at elevated temperatures up to about 500.degree. F. without requiring working below the recrystallization temperature of the alloy. Broad and preferred ranges are disclosed as follows:______________________________________ Broad (w/o) Preferred (w/o) ______________________________________ C 0.1 Max. 0.03 Max. Mn 5 Max. 2 Max. Si 1 Max. 0.5 Max. P 0.03 Max. 0.015 Max. S 0.03 Max. 0.010 Max. Cr 16-24 18-22 Mo 7-12 7.5-11 W 4 Max. -- Nb 2-6 2.75-4.25 Ti 0.50-2.5 0.75-1.5 Al Trace-1 0.05-0.35 B 0.02 Max. 0.001-0.006 Zr 0.50 Max. 0.08 Max. Co 5 Max. -- Cu 0-3 0.5 Max. N 0.04 Max. 0.01 Max. Fe 20 Max.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: September 17, 1996
    Assignee: CRS Holdings, Inc.
    Inventors: Richard B. Frank, Terry A. DeBold, Sunil Widge, James W. Martin
  • Patent number: 5066458
    Abstract: A heat resisting, controlled thermal expansion, nickel-iron base alloy consisting essentially of, in weight percent, about:______________________________________ C 0.1 max. Mn 0.5 max. a small but effective amount up to Si 0.7 P 0.015 max. S 0.010 max. Cr 0.8 max. Ni 32-52 Mo 0.5 max. Co 0-20 Ti 1-3 Al 0.2 max. Nb 5-7 V 0.5 max. Zr 0.1 max. B 0-0.02 Cu 0.8 max. W 0.5 max. Fe Bal. ______________________________________and an article formed therefrom are disclosed. The alloy provides an outstanding combination of elevated temperature tensile properties and notch rupture ductility by close control of the niobium and titanium in the alloy. Within the compositional range of the alloy niobium and titanium are balanced such that(a) % Nb.gtoreq.6.7-0.5(% Ti), for Ti.ltoreq.1.5%;(b) % Nb.gtoreq.18.3-8.2(% Ti), for Ti.gtoreq.1.5%; and(c) % Ti.ltoreq.0.67(% Nb-1.3). Furthermore, the sum, % Mn+% Cr+% Mo+% V+% Cu+% W.ltoreq.2.
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: November 19, 1991
    Assignee: Carpenter Technology Corporation
    Inventors: Edward A. Wanner, Sunil Widge
  • Patent number: 5059257
    Abstract: This invention provides a process for improving, to at least a predetermined level, the stress rupture life and/or stress rupture ductility of precipitation hardenable nickel and nickel-iron base alloys containing nickel, niobium, and silicon when said alloys have less than a predetermined level of these stress rupture properties when worked and aged by a primary heat treatment. This improvement in properties is accomplished by controlled precipitation of a sufficient quantity of a (Ni, Nb, Si)-containing intermetallic phase.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: October 22, 1991
    Assignee: Carpenter Technology Corporation
    Inventors: Edward A. Wanner, Sunil Widge
  • Patent number: 5019332
    Abstract: A heat, corrosion and wear resistant austenitic steel and article made therefrom is disclosed containing in weight percent about______________________________________ w/o ______________________________________ Carbon 0.35-1.50 Manganese 3.0-10.0 Silicon 2.0 max. Phosphorus 0.10 max. Sulfur 0.05 max. Chromium 18-28 Nickel 3.0-10.0 Molybdenum Up to 10.0 Vanadium Up to 4.0 Boron Up to 0.03 Nitrogen 0.25 min. Tungsten Up to 8.0 Niobium 1.0 max. ______________________________________the balance being essentially iron. To attain the unique combination of properties provided by the present alloy w/o C+w/o N must be at least about 0.7, w/o V+0.5 (w/o Mo)+0.25 (w/o W) must be about 0.8-9.0.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: May 28, 1991
    Assignee: Carpenter Technology Corporation
    Inventors: Dwight D. Wegman, Edward A. Wanner, Wilson P. Rehrer, Sunil Widge
  • Patent number: 4929419
    Abstract: A heat, corrosion and wear resistant austenitic steel and article made therefrom is disclosed containing in weight percent about______________________________________ w/o ______________________________________ Carbon 0.35-1.50 Manganese 3.0-10.0 Silicon 2.0 max. Phosphorus 0.10 max. Sulfur 0.05 max. Chromium 18-28 Nickel 3.0-10.0 Molybdenum Up to 10.0 Vanadium Up to 4.0 Boron Up to 0.03 Nitrogen 0.25 min. Tungsten Up to 8.0 Niobium 1.0 max. ______________________________________the balance being essentially iron. To attain the unique combination of properties provided by the present alloy w/o C+w/o N must be at least about 0.7, w/o V+0.5 (w/o Mo)+0.25 (w/o W) must be about 0.8-9.0.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: May 29, 1990
    Assignee: Carpenter Technology Corporation
    Inventors: Dwight D. Wegman, Edward A. Wanner, Wilson P. Rehrer, Sunil Widge