EP0709225A1 — Reversible multi-color thermal recording medium
Assigned to Nippon Paper Industries Co Ltd · Expires 1996-05-01 · 30y expired
What this patent protects
A reversible multi-color thermal recording medium comprises, laminated on a substrate: (i) an irreversible thermal composition comprising a colorless or pale basic achromatic dye and an organic irreversible heat-resistant color developer; and (ii) a reversible multi-color …
USPTO Abstract
A reversible multi-color thermal recording medium comprises, laminated on a substrate: (i) an irreversible thermal composition comprising a colorless or pale basic achromatic dye and an organic irreversible heat-resistant color developer; and (ii) a reversible multi-color thermal composition comprising a colorless or pale basic achromatic dye and an organic reversible heat-resistant color developer.
Drugs covered by this patent
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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