EP0542420A1 — Anionic xanthene derivatives and their use in inks
Assigned to Syngenta Ltd · Expires 1993-05-19 · 33y expired
What this patent protects
A compound of Formula (1): wherein: X¹ is a sulpho or carboxy group; each X² independently is a substituent; m has a value of from 0 to 2; Y¹ and Y² are each independently alkyl or halo; and Z is a carboxy group. The above compounds may…
USPTO Abstract
A compound of Formula (1): wherein: X¹ is a sulpho or carboxy group; each X² independently is a substituent; m has a value of from 0 to 2; Y¹ and Y² are each independently alkyl or halo; and Z is a carboxy group. The above compounds may be used as colorants for ink jet printing inks either alone or as a mixture with a second magenta compound.
Drugs covered by this patent
- Alunbrig (brigatinib) · Takeda
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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