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:
Jul. 08, 2025
Filed:
Aug. 16, 2021
Daisuke Inoue, Shizuoka, JP;
Mitsuaki Hirose, Shizuoka, JP;
Yohichi Kitagawa, Shizuoka, JP;
Masayuki Ukigaya, Kanagawa, JP;
Kenji Komito, Tokyo, JP;
Hiroshi Yamada, Shizuoka, JP;
Daisuke Inoue, Shizuoka, JP;
Mitsuaki Hirose, Shizuoka, JP;
Yohichi Kitagawa, Shizuoka, JP;
Masayuki Ukigaya, Kanagawa, JP;
Kenji Komito, Tokyo, JP;
Hiroshi Yamada, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner is provided. The toner comprises toner base particles, resin particles adhered to surfaces of the toner base particles, and an external additive adhered to the surfaces of the toner base particles. The toner base particles each comprising a binder resin, a colorant, and a wax. The toner has a storage elastic modulus G' of 4.0×10or less at 70° C. An embedment degree of the external additive is from 15% to 40%, as the embedment degree is measured by stirring 10 g of the toner and 20 g of a carrier in a 50-mL vial at 67 Hz for 60 minutes using a rocking mill.