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:
Jul. 20, 2010
Filed:
Jul. 18, 2008
Applicant:
James Shamburger, Spring, TX (US);
Inventor:
James Shamburger, Spring, TX (US);
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 10/36 (2006.01); B32B 15/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A polycrystalline diamond compact (PDC) drill bit having a plurality of PDC cutters, each having a body of diamond crystals containing catalyzing material, is coated with a material which is impervious to a given acid. After the coating is dried, a segment of the coating is removed and acid is supplied to the body of diamond crystals to leach out the catalyzing material contained within the exposed portion of the body.