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:
Nov. 16, 2010
Filed:
Mar. 31, 2008
Dah-ben Liang, Woodlands, TX (US);
Gary R. Portwood, Kingwood, TX (US);
James C. Minikus, Spring, TX (US);
Amardeep Singh, Houston, TX (US);
Jonathan Bitler, Fayetteville, AR (US);
Dah-Ben Liang, Woodlands, TX (US);
Gary R. Portwood, Kingwood, TX (US);
James C. Minikus, Spring, TX (US);
Amardeep Singh, Houston, TX (US);
Jonathan Bitler, Fayetteville, AR (US);
Smith International, Inc., Houston, TX (US);
Abstract
Cutting elements offering increased toughness and thermal fatigue resistance can be formed of a wear resistant material having coarse grains disposed in a binder matrix with a binder content of at least about 18% by weight. The coarse grains include grains of at least one selected from the group of a transition metal carbide, a transition metal boride, and transition metal nitride. The binder content and coarse grain size may be selected to provide a Rockwell A hardness of at least about 75 Ra or a wear number of at least about 1.5.