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. 22, 1992
Filed:
Dec. 14, 1990
Applicant:
Inventors:
Robert C Yu, Webster, NY (US);
John W Spiewak, Webster, NY (US);
Deborah Nichol-Landry, Rochester, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430 58 ; 430 56 ; 430 59 ;
Abstract
A protective overcoating layer for an electrophotographic imaging device prevents crystallization and leaching of hole transport compounds in a charge transport layer of the imaging device. The overcoat also prevents solvent and ink contact/bending stress charge transport layer cracking. The overcoating layer contains a polyester homopolymer which contains a hole transporting compound and an aliphatic diol in the polymer chain backbone. The homopolymer can be either a meta or para hole transport compound ester linkage polyester homopolymer.