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:
Jun. 12, 1984
Filed:
Oct. 09, 1981
Applicant:
Inventors:
Ronald R Miller, Beaverton, OR (US);
William R Barber, Jr, Portland, OR (US);
David A Hampel, Vancouver, WA (US);
James E Ault, Portland, OR (US);
Assignee:
ESCO Corporation, Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
428556 ; 428553 ; 428554 ; 428555 ; 428627 ; 164111 ; 427249 ;
Abstract
A method for making a drill bit and product resulting therefrom in which carbide elements are coated with carbide and nitride materials such as those of titanium as by chemical vapor deposition after which the elements are cast in molten steel.