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:
Dec. 10, 2019
Filed:
Feb. 18, 2016
Applicant:
Mitsubishi Pencil Company, Limited, Shinagawa-ku, Tokyo, JP;
Inventor:
Hisato Haga, Yokohama, JP;
Assignee:
MITSUBISHI PENCIL COMPANY, LIMITED, Shinagawa-Ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D 11/16 (2014.01); B43K 5/00 (2006.01); B43K 7/00 (2006.01); B43K 8/00 (2006.01); B43K 8/02 (2006.01);
U.S. Cl.
CPC ...
C09D 11/16 (2013.01); B43K 5/00 (2013.01); B43K 7/00 (2013.01); B43K 8/00 (2013.01); B43K 8/024 (2013.01);
Abstract
Provided is an aqueous ink composition for a writing instrument which is excellent in a drying property of drawn lines and a low temperature stability of the ink while inhibiting the pen tip from drying and which prevents the drawn lines from causing feathering and strike-through. The aqueous ink composition for a writing instrument described above contains at least a colorant, trimethylglycine, pentaerythritol, 10% by mass or less of a water-soluble organic solvent and water.