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. 06, 1990
Filed:
Jan. 17, 1989
Applicant:
Inventors:
Masayuki Maruta, Osaka, JP;
Katsuaki Kida, Osaka, JP;
Eio Hisajima, Osaka, JP;
Akio Kashihara, Osaka, JP;
Naoya Yabuuchi, Osaka, JP;
Assignee:
Nippon Paint Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; C08F / ;
U.S. Cl.
CPC ...
430110 ; 526217 ; 5262191 ; 526909 ; 430111 ;
Abstract
Resinous microparticles useful in toner for electrophotography which are made of vinyl resin obtained by emulsion polymerization of at least one .alpha.,.beta.-ethylenically unsaturated monomers in the presence of cationic surfactant having an onium salt structure and a polymerization initiator having an amidine or amidine salt structure and whose average particle diameter is in a range of from 0.01 to 1.mu., and toner composition comprising toner particles and resinous microparticles as abovementioned are provided.