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:
Oct. 31, 1989
Filed:
Apr. 28, 1988
Hiroyuki Takagiwa, Hachioji, JP;
Jiro Takahashi, Sagamihara, JP;
Meizo Shirose, Hino, JP;
Kunio Akimoto, Fujisawa, JP;
Masafumi Uchida, Hachioji, JP;
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Abstract
Toner for developing an electrostatic latent image comprising (a) a polyester resin of a non-linear copolymer having, as its side chain, an aliphatic hydrocarbon group containing therein 3 to 22 carbon atoms, said copolymer being obtained from polymerization of an etherified bisphenol monomer, a di-carboxilic acid monomer, and a polyhydric alcohol of tri-hydric or more and/or a monomer component containing a polycarboxylic acid monomer of tricarboxylic acid or more carboxylic or more, and at least one compound selected from the group consisting of (b) an alkylene-bis-aliphatic acid amide compound represented by the general formula; ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from saturated or unsaturated aliphatic hydrocarbon groups having not less than 10 carbon atoms, R.sub.3 and R.sub.4 are independently selected from a hydrogen atom and a group represented by --OCR.sub.5 wherein R.sub.5 is a saturated or unsaturated hydrocarbon group and n is a positive integer and (c) a wax containing not less than 20% by weight of ester component, the needle penetration degree of wax being not more than 4.