EP Patent

EP0021228A1 — 4-Substituted-3-hydroxy-3-pyrroline-2,5-dione compounds, process for their preparation and pharmaceutical compositions containing the same

Assigned to Merck and Co Inc · Expires 1981-01-07 · 45y expired

What this patent protects

Novel 4-substituted-3-hydroxy-3-pyrroline-2,5-diones are disclosed which inhibit glycolic acid oxidase and thus are useful in the treatment and prevention of calcium oxalate renal lithiasis.

USPTO Abstract

Novel 4-substituted-3-hydroxy-3-pyrroline-2,5-diones are disclosed which inhibit glycolic acid oxidase and thus are useful in the treatment and prevention of calcium oxalate renal lithiasis.

Drugs covered by this patent

Patent Metadata

Patent number: EP0021228A1
Jurisdiction: EP
Classification: —
Expires: 1981-01-07
Drug substance claim: No
Drug product claim: No
Assignee: Merck and Co Inc
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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