US Patent

US7851482 — Method for making analgesics

Composition of Matter · Assigned to Johnson Matthey PLC · Expires 2029-07-10 · 3y remaining

Vulnerability score 15/100 Ironclad — strong claim type, well-established, deep family

What this patent protects

This patent protects a method for making oxymorphone hydrochloride with reduced levels of alpha, beta unsaturated ketones.

USPTO Abstract

Improved analgesic oxymorphone hydrochloride contains less than 10 ppm of alpha, beta unsaturated ketones and pharmaceutical preparations comprising such oxymorphone hydrochloride. The oxymorphone hydrochloride is produced by reducing a starting material oxymorphone hydrochloride using gaseous hydrogen and under specified acidity, solvent system and temperature conditions. A specific polymorph of oxymorphone hydrochloride may be obtained by hydration.

Drugs covered by this patent

Patent Metadata

Patent number
US7851482
Jurisdiction
US
Classification
Composition of Matter
Expires
2029-07-10
Drug substance claim
Yes
Drug product claim
No
Assignee
Johnson Matthey PLC
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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