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. 03, 1979
Filed:
Sep. 14, 1976
Applicant:
Inventors:
Noel J De Volder, Edegem, BE;
Yvan K Gilliams, Hever, BE;
Assignee:
AGFA-GEVAERT N.V., Mortsel, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
427 17 ; 96 / ; 252 / ;
Abstract
A liquid developer composition suitable for rendering visible in the direct or reversed sense electrostatic charge patterns contained on a surface, which composition contains in a hydrocarbon liquid having a volume resistivity of at least 10.sup.9 Ohm.cm and a dielectric constant of less than 3, a negatively charged suspended toner comprising pigment particles bearing organic polymeric material on their surfaces and at least one organic ionic surfactant, wherein