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:
Aug. 02, 1994
Filed:
Dec. 15, 1992
Yoshihiro Inaba, Minami-Ashigara, JP;
Koichi Takashima, Minami-Ashigara, JP;
Izuru Matsui, Minami-Ashigara, JP;
Tsutomu Kubo, Minami-Ashigara, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A capsule toner comprising a core covered with an outer shell, the outer shell comprising a substance capable of forming a radical, a polymer comprising at least a unit derived from a quaternary ammonium salt-containing vinyl monomer represented by formula (I) being deposited on the surface of the outer shell, and basic carbon black being externally added to the capsule toner: ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group; R.sub.2, R.sub.3, and R.sub.4 each represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a benzyl group; Y represents --COO--, --CONH-- or a phenylene group; n represents an integer of from 1 to 7; and X.sup.- represents a halogen ion or an anion having a --COO.sup.- group or an --SO.sub.3.sup.- group.