Patents by Inventor Steven J. Matthews

Steven J. Matthews 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: 9551051
    Abstract: A weldable, high temperature oxidation resistant alloy with low solidification crack sensitivity and good resistance to strain age cracking. The alloy contains by weight percent, 25% to 32% iron, 18% to 25% chromium, 3.0% to 4.5% aluminum, 0.2% to 0.6% titanium, 0.2% to 0.43% silicon, up to 0.5% manganese and the balance nickel plus impurities. The Al+Ti content should be between 3.4 and 4.2 and the Cr/Al ratio should be from about 4.5 to 8.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: January 24, 2017
    Assignee: Haynes International, Inc.
    Inventors: Dwaine L. Klarstrom, Steven J. Matthews, Venkat R. Ishwar
  • Publication number: 20130294964
    Abstract: A weldable, high temperature oxidation resistant alloy with low solidification crack sensitivity and good resistance to strain age cracking. The alloy contains by weight percent, 25% to 32% iron, 18% to 25% chromium, 3.0% to 4.5% aluminum, 0.2% to 0.6% titanium, 0.2% to 0.43% silicon, up to 0.5% manganese and the balance nickel plus impurities. The Al+Ti content should be between 3.4 and 4.2 and the Cr/Al ratio should be from about 4.5 to 8.
    Type: Application
    Filed: July 12, 2013
    Publication date: November 7, 2013
    Applicant: HAYNES INTERNATIONAL, INC.
    Inventors: Dwaine L. Klarstrom, Steven J. Matthews, Venkat R. Ishwar
  • Patent number: 8506883
    Abstract: A weldable, high temperature oxidation resistant alloy with low solidification crack sensitivity and good resistance to strain age cracking. The alloy contains by weight percent, 25% to 32% iron, 18% to 25% chromium, 3.0% to 4.5% aluminum, 0.2% to 0.6% titanium, 0.2% to 0.4% silicon, 0.2% to 0.5% manganese and the balance nickel plus impurities. The Al+Ti content should be between 3.4 and 4.2 and the Cr/Al ratio should be from about 4.5 to 8.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: August 13, 2013
    Assignee: Haynes International, Inc.
    Inventors: Dwaine L. Klarstrom, Steven J. Matthews, Venkat R. Ishwar
  • Publication number: 20090155119
    Abstract: A weldable, high temperature oxidation resistant alloy with low solidification crack sensitivity and good resistance to strain age cracking. The alloy contains by weight percent, 25% to 32% iron, 18% to 25% chromium, 3.0% to 4.5% aluminum, 0.2% to 0.6% titanium, 0.2% to 0.4% silicon, 0.2% to 0.5% manganese and the balance nickel plus impurities. The Al+Ti content should be between 3.4 and 4.2 and the Cr/Al ratio should be from about 4.5 to 8.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 18, 2009
    Inventors: Dwaine L. Klarstrom, Steven J. Matthews, Venkat R. Ishwar
  • Patent number: 5002731
    Abstract: Disclosed is a cobalt-base alloy that has a valuable combination of both corrosion- and wear-resistant properties. The alloy nominally contains, in percent by weight, 25.5 chromium, 8.5 nickel, 3.0 iron, 5 molybdenum, 2 tungsten, 0.40 silicon, 0.75 manganese, 0.06 carbon, 0.08 nitrogen and the balance cobalt plus normal impurities normally found in alloys of this class. The alloy may also contain copper and certain "carbide formers" (i.e., columbium, tantalum, titanium, vanadium and the like) to tie up excess carbon and/or nitrogen that may be present.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: March 26, 1991
    Assignee: Haynes International, Inc.
    Inventors: Paul Crook, Aziz I. Asphahani, Steven J. Matthews
  • Patent number: 4846885
    Abstract: Disclosed is a nickel-base alloy eminently suited for use as a welding filler material. The alloy contains over 40% molybdenum with an effective content of silicon to provide a valuable combination of engineering properties which includes the combination of high strength, excellent corrosion resistance and welding characteristics. Commercial production of the alloy may be in many forms, for example, castings, powder metallurgy articles, wrought products and the like. A typical alloy of this invention contains about 42% molybdenum, 0.25% silicon and the balance nickel plus modifying elements and impurities.
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: July 11, 1989
    Assignee: Haynes International, Inc.
    Inventors: Aziz Asphahani, Steven J. Matthews
  • Patent number: 4129464
    Abstract: A process and an alloy are provided for producing high strength material having good ductility to provide a high strength, corrosion resistant alloy including the steps of (1) preparing a body of material having a composition consisting essentially of by weight, about 13% to 18% chromium, about 13% to 18% molybdenum, less than 0.01% carbon, less than about 6% iron, less than about 1.25% cobalt, less than about 4% tungsten, less than 0.5% aluminum, less than 1% manganese, less than 0.5% silicon, and the balance nickel with usual transient metals and impurities in ordinary amounts, and (2) thereafter aging said body at a temperature in the range about 900.degree. and 1100.degree. F to effect an A.sub.2 B ordering reaction in the composition.
    Type: Grant
    Filed: August 24, 1977
    Date of Patent: December 12, 1978
    Assignee: Cabot Corporation
    Inventors: Steven J. Matthews, H. Joseph Klein, Frank G. Hodge
  • Patent number: 3969111
    Abstract: A nickel-base cast alloy is provided having high retention of ductility and high thermal stability on aging coupled with low thermal expansion and good oxidation resistance. Such alloy has a composition in weight percent within the range molybdenum 13.7 to 15.5%, chromium 14.7 to 16.5%, carbon 0.02% max., boron up to 0.02%, manganese 0.3 to 1.0%, silicon 0.2 to 0.75%, cobalt 2.0% max., iron 3.0% max., tungsten 1.0% max., aluminum 0.1 to 0.5% and the balance nickel, said alloy having an N.sub.v number between 2.23 and 2.31.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: July 13, 1976
    Assignee: Cabot Corporation
    Inventors: Dennis S. Acuncius, Steven J. Matthews