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:
Nov. 11, 2025
Filed:
Oct. 22, 2020
Applicant:
Mitsubishi Pencil Company, Limited, Shinagawa-ku, JP;
Inventor:
Kosuke Ogura, Shinagawa-ku, JP;
Assignee:
MITSUBISHI PENCIL COMPANY, LIMITED, Shinagawa-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09D 11/00 (2014.01); C09D 11/17 (2014.01); C09D 11/18 (2006.01);
U.S. Cl.
CPC ...
C09D 11/17 (2013.01); C09D 11/18 (2013.01);
Abstract
An aqueous ink composition suitable for writing instruments may achieve excellent color development and excellent darkness of a drawn line, while colored resin particles encapsulating a pigment are used. An embodiment of the aqueous ink composition for writing instruments includes an aqueous ink composition for writing instruments containing at least colored resin particles (A) having a pigment (p) encapsulated in, and colored resin particles (B) having a pigment (p) exposed on a surface.