Patents by Inventor Heidi Ziegler Doll

Heidi Ziegler Doll 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).

  • Cobalt-rich wear resistant alloy and method of making and use thereof
    Patent number: 11155904
    Abstract: A cobalt-rich wear resistant and corrosion resistant alloy useful for parts of a combustion engine such as valve seat inserts includes, in weight % about 0.1 to about 0.8% C, about 0.1 to about 1.5% Mn, about 3 to about 5% Si, about 10 to about 20% Cr, about 5 to about 32% Fe, about 0.5 to about 4% W, about 10 to about 30% Mo, up to about 20% Ni, about 20 to about 40% Co, up to about 6% V, up to about 3% Nb, total V plus Nb of about 0.5 to about 8.5% and balance unavoidable impurities including up to 0.035% P, up to 0.015% S and up to 0.250% N.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: October 26, 2021
    Assignee: L.E. Jones Company
    Inventors: Cong Yue Qiao, David M Doll, Heidi Ziegler Doll, Douglas W. Dooley, Daniel W. Bancroft
  • COBALT-RICH WEAR RESISTANT ALLOY AND METHOD OF MAKING AND USE THEREOF
    Publication number: 20210010113
    Abstract: A cobalt-rich wear resistant and corrosion resistant alloy useful for parts of a combustion engine such as valve seat inserts includes, in weight % about 0.1 to about 0.8% C, about 0.1 to about 1.5% Mn, about 3 to about 5% Si, about 10 to about 20% Cr, about 5 to about 32% Fe, about 0.5 to about 4% W, about 10 to about 30% Mo, up to about 20% Ni, about 20 to about 40% Co, up to about 6% V, up to about 3% Nb, total V plus Nb of about 0.5 to about 8.5% and balance unavoidable impurities including up to 0.035% P, up to 0.015% S and up to 0.250% N.
    Type: Application
    Filed: July 11, 2019
    Publication date: January 14, 2021
    Applicant: L.E. Jones Company
    Inventors: Cong Yue Qiao, David M Doll, Heidi Ziegler Doll, Douglas W. Dooley, Daniel W. Bancroft