Patents by Inventor William Tambussi

William Tambussi 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).

  • Lubricant System For Use In Powder Metallurgy
    Publication number: 20170113272
    Abstract: The present invention is directed to metallurgical powder compositions having improved lubricant properties. These compositions of the invention include at least 90 wt. % of an iron-based metallurgical powder; a Group 1 or Group 2 metal stearate; a first wax having a melting range of between about 80 and 100° C.; a second wax having a melting range of between about 80 and 90° C.; zinc phosphate; boric acid; acetic acid; phosphoric acid; and polyvinylpyrrolidone. Methods of compacting the compositions, as well as compacted articles prepared using those methods, are also described.
    Type: Application
    Filed: January 3, 2017
    Publication date: April 27, 2017
    Inventors: Francis G. Hanejko, William Tambussi
  • Lubricant system for use in powder metallurgy
    Patent number: 9533353
    Abstract: The present invention is directed to metallurgical powder compositions having improved lubricant properties. These compositions of the invention include at least 90 wt. % of an iron-based metallurgical powder; a Group 1 or Group 2 metal stearate; a first wax having a melting range of between about 80 and 100° C.; a second wax having a melting range of between about 80 and 90° C.; zinc phosphate; boric acid; acetic acid; phosphoric acid; and a binder. Methods of compacting the compositions, as well as compacted articles prepared using those methods, are also described.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: January 3, 2017
    Assignee: Hoeganaes Corporation
    Inventors: Francis G. Hanejko, William Tambussi