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. 25, 1982
Filed:
Dec. 30, 1980
Yvan K Gilliams, Hever, BE;
Pierre R De Roo, Schoten, BE;
Agfa-Gevaert N.V., Mortsel, BE;
Abstract
Electrostatic developer composition and method for developing therewith an electrostatic charge pattern of positive charge wherein the composition is free of carrier particles and consists of powder particles containing at least 80% by weight of a mixture of at least 30% by weight of: a polyester derived from fumaric acid or a mixture of at least 95 mol % fumaric acid and isophthalic acid and a polyol blend of propoxylated bisphenol characterized by the formula: ##STR1## wherein m and n are integers and added together average from 2 to 7, and at least one of (1) a copolymer of ethylene, maleic acid and/or maleic anhydride wherein from 50 to 70 mol % of ethylene repeating units are present, and (2) a wax of the group consisting of castor wax and montan wax.