The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 1989
Filed:
Dec. 16, 1986
Applicant:
Inventors:
Charles J Terry, Fallon, NV (US);
Jack D Frank, Fallon, NV (US);
Assignee:
Kennametal Inc., Latrobe, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C01G / ;
U.S. Cl.
CPC ...
423440 ; 423 53 ; 501 87 ; 501 93 ;
Abstract
In the alumino-thermit method of producing tungsten monocarbide powders, metallic iron is added to the reaction charge in quantities to control the calculated reaction temperature within the range of about 4372.degree. to about 4500.degree. F. It has been found that this process can now be controlled to produce macrocrystalline tungsten carbide powders which are very low in Ti, Ta and Nb content and have a very narrow range of total carbon contents.