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. 02, 2025
Filed:
Jun. 13, 2022
Applicant:
Mitsubishi Pencil Company, Limited, Tokyo, JP;
Inventor:
Kosuke Ogura, Tokyo, JP;
Assignee:
MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D 11/17 (2014.01);
U.S. Cl.
CPC ...
C09D 11/17 (2013.01);
Abstract
A composite colored particle may include a resin particle carrying a positive electric charge on a particle surface, a colored particle carrying a negative electric charge on a particle surface, and a low-density particle, the colored particle and the low-density particle forming a composite with the resin particle through Coulomb force. A water-based ink composition may contain such composite colored particles dispersed in a water-based medium. A writing instrument may be loaded with such a water-based ink composition.