Patents by Inventor Weija Tang

Weija Tang 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).

  • Martensitic Stainless Steel Strengthened by Copper-Nucleated Nitride Precipitates
    Publication number: 20150075681
    Abstract: A martensitic stainless steel alloy is strengthened by copper-nucleated nitride precipitates. The alloy includes, in combination by weight percent, about 10.0 to about 12.5 Cr, about 2.0 to about 7.5 Ni, up to about 17.0 Co, about 0.6 to about 1.5 Mo, about 0.5 to about 2.3 Cu, up to about 0.6 Mn, up to about 0.4 Si, about 0.05 to about 0.15 V, up to about 0.10 N, up to about 0.035 C, up to about 0.01 W, and the balance Fe and incidental elements and impurities. The nitride precipitates may be enriched by one or more transition metals.
    Type: Application
    Filed: August 18, 2014
    Publication date: March 19, 2015
    Inventors: James A. Wright, Gregory B. Olson, Weija Tang
  • MARTENSITIC STAINLESS STEEL STRENGTHENED BY COPPER-NUCLEATED NITRIDE PRECIPITATES
    Publication number: 20110094637
    Abstract: A martensitic stainless steel alloy is strengthened by copper-nucleated nitride precipitates. The alloy includes, in combination by weight percent, about 10.0 to about 12.5 Cr, about 2.0 to about 7.5 Ni, up to about 17.0 Co, about 0.6 to about 1.5 Mo, about 0.5 to about 2.3 Cu, up to about 0.6 Mn, up to about 0.4 Si, about 0.05 to about 0.15 V, up to about 0.10 N, up to about 0.035 C, up to about 0.01 W, and the balance Fe and incidental elements and impurities. The nitride precipitates may be enriched by one or more transition metals.
    Type: Application
    Filed: April 13, 2009
    Publication date: April 28, 2011
    Applicant: QUESTEK INNOVATIONS LLC
    Inventors: James A. Wright, Gregory B. Olson, Weija Tang