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. 28, 1977
Filed:
Apr. 12, 1976
Applicant:
Inventors:
Toshiyuki Kawanishi, Tokyo, JA;
Norimasa Sohmiya, Tokyo, JA;
Assignee:
Kabushiki Kaisha Ricoh, Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
252 / ;
Abstract
Liquid developers for use in electrostatic photography in which toner particles comprising pigment and specific polymer mixes having a particle size of from 0.2 to 0.8 .mu., and a particle size distribution such that about 90% of the particles are in the particle size range of from 0.3 to 0.6 .mu., are dispersed in a petroleum aliphatic hydrocarbon solvent having a solubility parameter of from 7.0 to 7.5, and method of preparation.