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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.:

US 12767815 B1

PDFFull Text
Date of Patent:
Oct. 20, 2026

Filed:

Mar. 02, 2023

Resin particles, method of producing resin particles, toner, toner storage unit, and image forming apparatus

Applicants:

Tsuneyasu Nagatomo, Shizuoka, JP;

Junichi Watanabe, Shizuoka, JP;

Yuka Mizoguchi, Shizuoka, JP;

Kohsuke Satoh, Shizuoka, JP;

Inventors:

Tsuneyasu Nagatomo, Shizuoka, JP;

Junichi Watanabe, Shizuoka, JP;

Yuka Mizoguchi, Shizuoka, JP;

Kohsuke Satoh, Shizuoka, JP;

Assignee:

Ricoh Company, Ltd., Tokyo, JP;

Attorney:

Grüneberg Global IP, PLLC

Primary Examiner:

Marc S Zimmer

Assistant Examiner:

Virginia L Stonehocker

Int. Cl.
CPC ...
C08L 67/03 (2006.01); C08G 63/127 (2006.01); C08G 63/183 (2006.01); C08J 3/12 (2006.01); C08L 67/00 (2006.01); C08L 67/02 (2006.01); G03G 9/087 (2006.01); G03G 9/093 (2006.01);
U.S. Cl.
CPC ...
C08L 67/03 (2013.01); C08G 63/127 (2013.01); C08G 63/183 (2013.01); C08J 3/126 (2013.01); C08L 67/00 (2013.01); C08L 67/02 (2013.01); G03G 9/08755 (2013.01); G03G 9/09328 (2013.01); G03G 9/09371 (2013.01); G03G 9/09392 (2013.01); C08J 2367/03 (2013.01); C08J 2391/06 (2013.01); C08J 2467/03 (2013.01); C08L 2207/53 (2013.01);
Abstract

Resin particles include a binder resin in each of the resin particles. The binder resin includes a biomass-derived resin, and polyethylene terephthalate or polybutylene terephthalate. An amount A of a biomass-derived component of the biomass-derived resin and an amount B of the polyethylene terephthalate or the polybutylene terephthalate satisfy A>B. Each of the resin particles has a core-shell structure including a shell layer and a core layer. An average thickness of the shell layer is from 100 nm to 500 nm.

Find Patent Forward Citations

Nagatomo, Tsuneyasu. (2026). Resin particles, method of producing resin particles, toner, toner storage unit, and image forming apparatus (U.S. Patent No. 12767815). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12767815

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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