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:
Feb. 13, 2007
Filed:
Mar. 25, 2004
Applicants:
Takuo Tanaka, Saitama, JP;
Satoshi Kawata, Saitama, JP;
Takayuki Okamoto, Saitama, JP;
Inventors:
Assignee:
Riken, Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05B 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is a film comprising PMMA and a fluorescent substance having a xanthene skeleton and a lactone ring and/or a fluorescent substance having a xanthene skeleton and a group —COOR, where R represents a hydrogen atom or a substituent, capable of forming an intramolecular lactone ring, said fluorescent substances being dispersed in the PMMA. The film is useful as an optical memory.