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:
Feb. 10, 1998
Filed:
Jul. 31, 1996
Applicant:
Inventor:
Takao Koyama, Tano-gun, JP;
Assignee:
Mitsubishi Pencil Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 3111 ; 106 3196 ;
Abstract
Provided is a non-erasable pencil lead for a natural pencil and a mechanical pencil, characterized in that the pores of a baked pencil lead are impregnated with an unsaturated compound containing an unsaturated group having an iodine value of at least 130 or more, wherein an antioxidant, an oxidative polymerization catalyst and/or a photosensitizer can be added in addition to the unsaturated compound.
Koyama, Takao. (1998). Non-erasable pencil lead (U.S. Patent No. 5716434). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5716434
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile