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:
Sep. 03, 1991
Filed:
Feb. 07, 1990
Applicant:
Inventors:
Frank J Onorato, Phillipsburg, NJ (US);
David E Nikles, Colonia, NJ (US);
Rachel S Kohn, Springfield, NJ (US);
Susan C Castles, South River, NJ (US);
Harris A Goldberg, Colonia, NJ (US);
Assignee:
Hoechst Celanese Corp., Somerville, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; B32B / ;
U.S. Cl.
CPC ...
430495 ; 430270 ; 430945 ; 428 64 ; 3461351 ;
Abstract
Provided is a method for stabilizing an optical information medium by incorporating an effective amount of a specific nitrogen containing compound into the medium. The specific nitrogen containing compounds are poly(2-vinyl pyridine), poly(4-vinyl pyridine), pentaethylene hexamine and acridine orange base. Incorporation of one of the nitrogen compounds into the optical information medium prolongs the useful life of the medium.