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:
Jun. 19, 1984
Filed:
May. 30, 1980
Koji Ishikawa, Chiba, JP;
Hiroshi Ozawa, Kanagawa, JP;
Nobuki Kobayashi, Yokohama, JP;
Yoshio Kikuta, Zushi, JP;
Kenichi Nakane, Hayama, JP;
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;
Abstract
An electrophotographic toner comprising a constituent resin and a colorant, in which the constituent resin has a softening point ranging from room temperature to 170.degree. C. and comprises (a) a copolymer of cinnamic acid and one or more vinyl monomers, (b) a mixture of a copolymer as defined in (a) and a polymer having good compatibility therewith, (c) a mixture of a copolymer as defined in (a) and cinnamic acid, (d) a mixture of a polymer as defined in (b) and cinnamic acid, or (e) a mixture of a mixture as defined in (b) and cinnamic acid, the cinnamic acid content of the constituent resin being from 1 to 25 parts by weight per 100 parts by weight of the constituent resin in the case of cinnamic acid copolymerized with one or more vinyl monomers and from 0.1 to 25 parts by weight per 100 parts by weight of the constituent resin in the case of cinnamic acid present in the uncombined state.