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Serving leading biopharmaceutical companies globally:

Johnson and Johnson
Fish and Richardson
Farmers Insurance
Argus Health

Generated: November 23, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,377,584

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Summary for Patent: 4,377,584

Title: 4-Aza-17.beta.-substituted-5.alpha.-androstan-3-one-reductase inhibitors
Abstract:4-Aza-17.beta.-substituted-5.alpha.-androstan-3-ones and their A-homo analogs of the formula: ##STR1## where Formula (I) may also have the structure of partial Formulas (II) and/or (III); and pharmaceutically acceptable salts of the above compounds are active as testosterone 5.alpha.-reductase inhibitors, and thus useful topically for treatment of acne, seborrhea, female hirsutism, and systemically in treatment of benign prostatic hypertrophy.
Inventor(s): Rasmusson; Gary H. (Watchung, NJ), Johnston; David B. R. (Warren, NJ), Arth, deceased; Glen E. (late of Cranford, NJ)
Assignee: Merck & Co., Inc. (Rahway, NJ)
Application Number:06/189,981
Patent Claim Types:
see list of patent claims
Compound; Use; Dosage form; Composition;

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International Patent Family for Patent: 4,377,584

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Finland67389► Subscribe
Finland791193► Subscribe
Australia527030► Subscribe
Australia4569779► Subscribe
Bulgaria61244► Subscribe
Canada1142914► Subscribe
Germany2966173► Subscribe
Denmark92192► Subscribe
Denmark152579► Subscribe
Denmark165325► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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Serving leading biopharmaceutical companies globally:

US Army
Argus Health
Cantor Fitzgerald

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