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. 03, 2026
Filed:
Jan. 29, 2021
Zeon Corporation, Tokyo, JP;
Kojiro Akazaki, Tokyo, JP;
ZEON CORPORATION, Tokyo, JP;
Abstract
A toner excellent in low-temperature fixing property and shelf stability. The toner comprising colored resin particles containing a binder resin, a colorant, a softening agent and a charge control agent, and an external additive, wherein a glass transition temperature (Tg) specified from a temperature dependence curve for a loss tangent (tan δ) of the toner, which is obtained by a dynamic viscoelastic measurement of the toner at a measurement frequency of 24 Hz, satisfies 45° C.<Tg(° C.)<100° C., and formula (I-1): 5.00×10<(tan δ(Tg)−tan δ(45° C.))/(Tg−45)<7.60×10and formula (I-2): −3.0×10<(tan δ(130° C.)−tan δ(100° C.))/30<9.8×10are satisfied, or formula (II-1): 5.00×10<(tan δ(Tg)−tan δ(45° C.))/(Tg−45)<7.60×10and formula (II-2): 2.1×10<(tan δ(130° C.)−tan δ(100° C.))/30<4.4×10are satisfied.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile