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:
Apr. 12, 1977
Filed:
Jun. 16, 1975
Applicant:
Inventors:
Nobuhiro Ishida, Yokohama, JA;
Kazuyuki Saito, Kofu, JA;
Assignees:
Mitsubishi Chemical Industries Ltd., Tokyo, JA;
Oriental Sangyo Co., Ltd., Yamanashi, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
260 38 ; 106 19 ; 260833 ; 260844 ; 264211 ;
Abstract
A pencil lead comprises an extrudate of a kneaded blend of a coloring material and a novolak resin or a derivative thereof.