EP Patent

EP0462639A1 — Preparation of 2-chloropyridine derivatives

Assigned to Shell Internationale Research Maatschappij BV · Expires 1991-12-27 · 34y expired

What this patent protects

Certain 2-chloropyridine derivatives, which are useful as starting materials for the preparation of various herbicides and fungicides, are prepared by cyclisation of 1,3-butadiene derivatives in the presence of hydrogen chloride.

USPTO Abstract

Certain 2-chloropyridine derivatives, which are useful as starting materials for the preparation of various herbicides and fungicides, are prepared by cyclisation of 1,3-butadiene derivatives in the presence of hydrogen chloride.

Drugs covered by this patent

Patent Metadata

Patent number: EP0462639A1
Jurisdiction: EP
Classification: —
Expires: 1991-12-27
Drug substance claim: No
Drug product claim: No
Assignee: Shell Internationale Research Maatschappij BV
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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