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:
Apr. 23, 1996
Filed:
Apr. 28, 1994
Applicant:
Inventors:
Masahiro Watabe, Yokohama, JP;
Toshinari Miura, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355299 ;
Abstract
A cleaning blade is formed of a polyurethane elastomer obtained by using a hardener composition including at least trimethylolpropane. The polyurethane elastomer has the properties of (1) a trimethylolpropane concentration of at least 0.10 mM/g; (2) a urethane group concentration of at least 2.20 mM/g; and (3) a tan.delta. having a maximum value at a temperature of at most 12.degree. C.