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:
Apr. 01, 2008
Filed:
Dec. 14, 2004
Eiji Shirai, Wakayama, JP;
Tetsuya Ueno, Wakayama, JP;
Yasunori Inagaki, Wakayama, JP;
Kao Corporation, Tokyo, JP;
Abstract
A toner for electrophotography, containing a low-softening point polyester-based resin having a softening point of from 80° to 120° C.; and a high-softening point polyester-based resin having a softening point of higher than 120° C. and 160° C. or lower, wherein the low-softening point polyester-based resin has a viscosity at 160° C. of from 500 to 10000 Pa·s, and a ratio of viscosity at 140° C. to viscosity at 180° C. is 10 or less, and wherein a weight ratio of the low-softening point polyester-based resin to the high-softening point polyester-based resin is from 20/80 to 90/10. The toner for electrophotography of the present invention is used for, for instance, developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.