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:
Sep. 30, 2003
Filed:
Jul. 27, 2001
Applicant:
Inventors:
Assignee:
Mitsubishi Pencil Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B 1/04 ; H05B 3/10 ;
U.S. Cl.
CPC ...
H01B 1/04 ; H05B 3/10 ;
Abstract
Carbonization is achieved and impurity elements are removed by combination of a metal or metalloid compound with a composition exhibiting a carbon residual yield that is substantially not zero after firing, followed by firing at a pressure of no higher than 1×10 Pa and a temperature of from 1500° C. to 2200° C.