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. 29, 1992
Filed:
Jan. 23, 1989
Wolfgang Wiedemann, Geisenheim, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
The invention described a multilayer recording medium for optical information for use in a single recording operation and the process for its production. The multilayer recording medium essentially comprises a support and a layer comprising an unsubstituted naphthalocyanine dye. A binder layer is disposed between the support and the dye layer or the dye layer carries a binder layer which, in turn, is coated with a dye layer. Moreover, the invention describes composite systems, in particular, adhesive-bonded systems constructed from these multilayer recording media. As compared to recording media of the prior art, the media and composite systems according to the present invention exhibit a high reflectivity and require a lower write-pulse energy, while maintaining a particular contrast ratio.