Patents by Inventor Venkat R. Ishwar

Venkat R. Ishwar 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).

  • Weldable oxidation resistant nickel-iron-chromium aluminum alloy
    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
  • WELDABLE OXIDATION RESISTANT NICKEL-IRON-CHROMIUM ALUMINUM ALLOY
    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
  • Weldable oxidation resistant nickel-iron-chromium-aluminum alloy
    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
  • Weldable oxidation resistant nickel-iron-chromium-aluminum alloy
    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