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. 08, 2008
Filed:
Nov. 18, 2005
Applicants:
Koichi Saito, Kawagoe, JP;
Kunio Shimizu, Otsuki, JP;
Isamu Michihata, Machida, JP;
Inventors:
Assignee:
Konica Minolta Opto, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B 3/00 (2006.01); C08L 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A retardation film containing a polyalcohol ester, a polycarboxylic acid ester, and a cellulose ester, wherein a total acylation degree of the cellulose ester is in the range of 2.4-2.8; and a Mw/Mn value of the cellulose ester is in the range of 1.4-3.0, provided that Mw represents a weight average molecular weight and Mn represent a number average molecular weight of the cellulose ester.