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:
Jun. 16, 2020
Filed:
Jul. 31, 2018
Lexmark International, Inc., Lexington, KY (US);
David Glenn Black, Broomfield, CO (US);
Mark Thomas Bellino, Loveland, CO (US);
Weimei Luo, Louisville, CO (US);
LEXMARK INTERNATIONAL, INC., Lexington, KY (US);
Abstract
An improved overcoat layer for an organic photoconductor drum used in an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a charge transport molecule containing four radical polymerizable hydrophilic functional groups containing an oxygen atom of the general structure shown below: wherein Rand Rcontain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom, Rand Rare a non-radical polymerizable functional group, and Rand Rcontain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom. The curable composition may also contain at least one optional curing agent. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its service life.