Patents by Inventor William D. Lafferty

William D. Lafferty 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).

  • Molybdenum plasma spray powder, process for producing said powder, and coatings made therefrom
    Patent number: 4146388
    Abstract: Plasma spray powders of molybdenum particles containing at least 0.5 weight percent oxygen and obtained by reacting molybdenum particles with oxygen or oxides in a plasma, form plasma spray coatings exhibiting hardnesses comparable to flame sprayed coatings formed from molybdenum wire and plasma coatings of molybdenum powder containing hardening alloy powders. Such oxygen rich molybdenum powders may be used to form wear resistant coatings, such as for piston rings.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: March 27, 1979
    Assignee: GTE Sylvania Incorporated
    Inventors: William D. Lafferty, Richard F. Cheney, Richard H. Pierce
  • Cermet plasma flame spray powder, method for producing same and articles produced therefrom
    Patent number: 3960545
    Abstract: Plasma flame spray coatings exhibiting improved hardness and wear resistance are produced from flame spray powders comprising spray dried agglomerates of finely divided molybdenum and alumina powder subparticles, wherein the diameters of the agglomerates are at least two times the maximum diameter of the subparticles.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: June 1, 1976
    Assignee: GTE Sylvania Incorporated
    Inventors: David J. Port, William D. Lafferty, Richard F. Cheney