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:
Sep. 25, 1984
Filed:
Apr. 26, 1982
Heinz Herrmann, Wiesbaden, DE;
Hans-Joachim Schlosser, Wiesbaden, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A liquid developer containing negatively charged toner particles for developing electrostatic charge images, comprising a carrier liquid having a high electrical resistivity and a low dielectric constant, a pigment or dye constituent, a resinous binder, a charge controller and conventional additives, wherein the pigment or dye constituent is dispersed in a solution of styrene/butadiene copolymer binder in the carrier liquid; and a process for preparing the liquid developer by mixing a dispersion of the pigment or dye constituent in a solution of the copolymer binder in the carrier liquid with a solution of the charge controller in the carrier liquid.