EP Patent

EP1892269A1 — Compositions comprising monosubstituted squaric acid metal complex dyes and merocycanine based dyes and their use in optical layers for optical data recording

Assigned to Clariant International Ltd · Expires 2008-02-27 · 18y expired

What this patent protects

The present invention relates to compositions monosubstituted squaric acid metal complex dyes and merocycanine based dyes and their use in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength up to 450 nm. The inve…

USPTO Abstract

The present invention relates to compositions monosubstituted squaric acid metal complex dyes and merocycanine based dyes and their use in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength up to 450 nm. The invention further relates to a write once read many (WORM) type optical data recording medium capable of recording and reproducing information with radiation of blue laser, which employs compositions comprising monosubstituted squaric acid metal complex dyes and merocycanine based dyes in the optical layer.

Drugs covered by this patent

Patent Metadata

Patent number
EP1892269A1
Jurisdiction
EP
Classification
—
Expires
2008-02-27
Drug substance claim
No
Drug product claim
No
Assignee
Clariant International Ltd
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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