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:
Oct. 15, 1985
Filed:
Jan. 16, 1985
Peter S Alexandrovich, Rochester, NY (US);
Louis J Sorriero, Rochester, NY (US);
Chandra Sreekumar, Penfield, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Liquid electrographic developers are disclosed comprising an electrically insulating liquid carrier, toner, a charge-control agent and a charging agent. The charge-control agent is a carrier-soluble, addition copolymer of a quaternary ammonium salt monomer, a monomer having --COOH, --SO.sub.3 H or --PO.sub.3 HR acidic function wherein R is hydrogen or alkyl, and a solubilizing monomer. The charging agent is a carrier-soluble, addition polar copolymer. The disclosed developers exhibit improved replenishability as evidenced by reduced buildup of charge in the developers during the course of use and repeated replenishment.