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:
Apr. 18, 1989
Filed:
Jul. 18, 1985
Applicant:
Inventors:
Satoru Inoue, Mishima, JP;
Akio Matsui, Numazu, JP;
Assignee:
Ricoh Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430106 ; 430109 ; 430110 ;
Abstract
The present invention provides a positively chargeable for use in dry type electrophotography that contains, as a charge controlling agent, a lake (blue pigment) of a compound represented by the general formula: ##STR1## [Wherein, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are H, CnH.sub.2 n+1(n is an integer of 1-5) or ##STR2## These R.sub.1 -R.sub.6 may be the same or different].