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. 07, 1987
Filed:
Aug. 30, 1985
Applicant:
Inventors:
Shinichiro Ohara, Fujinomiya, JP;
Yohnosuke Takahashi, Fujinomiya, JP;
Kyoichi Naruo, Fujinomiya, JP;
Fumiaki Shinozaki, Fujinomiya, JP;
Assignee:
Fuji Photo Film Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G01D / ; G01D / ;
U.S. Cl.
CPC ...
430272 ; 430945 ; 430271 ; 428441 ; 428442 ; 428438 ; 3461351 ; 346 / ;
Abstract
An information recording medium comprising in order, a glass substrate; a layer for preventing diffusion of alkali metal ions and alkaline earth metal ions from the substrate; a thermal barrier layer, and an information recording layer for writing and/or reading information by means of laser beam.