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:
May. 07, 1991
Filed:
Aug. 07, 1989
Applicant:
Inventors:
Horst Harnisch, Much, DE;
Roderich Raue, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430110 ; 546 37 ; 546 63 ; 544124 ; 544125 ; 544361 ; 548431 ; 548472 ; 548482 ;
Abstract
Positively charged electrophotographic toners contain, besides customary resin and pigment particles, an additive which increases the cationic charge and has the general formula