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:
Jul. 11, 2000
Filed:
Oct. 13, 1998
Applicant:
Inventors:
Bradley Leonard Beach, Lexington, KY (US);
Todd Lucas Janes, Lexington, KY (US);
Jean Marie Massie, Lexington, KY (US);
Donald Wayne Stafford, Richond, KY (US);
Assignee:
Lexmark International, Inc., Lexington, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
4284259 ; 4284231 ; 4284258 ; 492 59 ;
Abstract
An electrophotographic developer roller with a highly resistive layer over a conductive core is made by mixing polyurethane and ferric chloride. After curing, the roller is soaked in hydrogen peroxide to oxidize the outer surface. The oxidized surface layer is electrically resistive. An excellent developer roller is achieved at low production cost.