EP Patent

EP0169375A2 — Process for producing 2-tert.-butyl-4,5-dichloro-3(2H)-pyridazinone

Assigned to Nissan Chemical Corp · Expires 1986-01-29 · 40y expired

What this patent protects

Novel processes for producing 2-tert.-butyl-4,5-dichloro--3(2H)-pyridazinone comprise reacting tert. -butylhydrazine with mucochloric acid in an aromatic hydrocarbon and/or chlorinated hydrocarbon solvent. A novel compound, mucochloric acid-tert.-butylhydrazone, is also provided …

USPTO Abstract

Novel processes for producing 2-tert.-butyl-4,5-dichloro--3(2H)-pyridazinone comprise reacting tert. -butylhydrazine with mucochloric acid in an aromatic hydrocarbon and/or chlorinated hydrocarbon solvent. A novel compound, mucochloric acid-tert.-butylhydrazone, is also provided as an intermediate product.

Drugs covered by this patent

Patent Metadata

Patent number: EP0169375A2
Jurisdiction: EP
Classification: —
Expires: 1986-01-29
Drug substance claim: No
Drug product claim: No
Assignee: Nissan Chemical Corp
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.

Track this patent

Get a daily-checked alert when vulnerability score, expiry, classification, or assignee changes. Email, Slack, or Teams delivery. Pro: 50 watches, Free: 3.