CA Patent

CA2672644A1 — Improved method for making analgesics

Assigned to Johnson Matthey PLC · Expires 2008-06-19 · 18y expired

What this patent protects

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…

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
CA2672644A1
Jurisdiction
CA
Classification
—
Expires
2008-06-19
Drug substance claim
No
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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