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:
Jun. 06, 1989
Filed:
Mar. 11, 1988
Applicant:
Inventor:
Masahiro Irie, Sakai, JP;
Assignee:
Mitsubishi Chemical Industries Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428 76 ; 428441 ; 428480 ; 428515 ; 428522 ; 428523 ; 428524 ; 428413 ; 428532 ; 428333 ; 428334 ; 428335 ; 428336 ; 428908 ; 428913 ; 430945 ; 369288 ; 346 / ; 3461351 ;
Abstract
An optical recording material comprising a recording layer containing a substance with its optical properties changeable by irradiation with light in which information is recorded by irradiating the recording layer with light, said substance being an ethylene derivative having at its 1- and 2-positions heterocyclic groups which are cyclizable by irradiation with light to form a cyclohexadiene ring and thereby change the optical properties, and the other 1- and 2-positions connected to each other to form a ring.