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:
Jun. 28, 2016
Filed:
Feb. 19, 2013
Applicant:
Kabushiki Kaisha Pilot Corporation, Tokyo-to, JP;
Inventors:
Hirotaka Masuda, Kanagawa-ken, JP;
Naoto Masushige, Aichi-ken, JP;
Assignee:
KABUSHIKI KAISHA PILOT CORPORATION, Tokyo-To, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B43K 5/16 (2006.01); B43K 7/10 (2006.01); B43K 29/00 (2006.01); B43K 7/02 (2006.01); B43K 7/06 (2006.01); B43K 1/08 (2006.01); B43K 7/00 (2006.01); C22C 29/08 (2006.01); C23C 16/02 (2006.01); C23C 16/26 (2006.01); C23C 16/56 (2006.01); C09D 11/18 (2006.01);
U.S. Cl.
CPC ...
B43K 7/10 (2013.01); B43K 1/08 (2013.01); B43K 1/082 (2013.01); B43K 1/084 (2013.01); B43K 7/00 (2013.01); B43K 7/005 (2013.01); B43K 7/02 (2013.01); B43K 7/06 (2013.01); B43K 7/105 (2013.01); C09D 11/18 (2013.01); C22C 29/08 (2013.01); C23C 16/0272 (2013.01); C23C 16/26 (2013.01); C23C 16/56 (2013.01);
Abstract
A writing instrument includes a pen point retaining member, a pen point that is attached to a first end of the pen point retaining member, an ink tank that is attached to a second end of the pen point retaining member, and an ink that is accommodated in the ink tank. The ink includes a lubricating interface layer-forming compound, and a carbonaceous film is formed on at least one of a surface of the ball or a contact portion of the ball holding portion with the ball.