US4456620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D-Homo-4,17-androstadien-3-one, its preparation and pharmaceutical use
Assignee: Bayer Pharma AG
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Filing: 1982-04-13
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Granted: 1984-06-26
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Expires: 2002-04-13
Abstract
Abstract D-Homo-4,17-androstadien-3-one is a pharmacologically effective compound having antiandrogenic activity upon topical application. The compound can be prepared from D-homo-5,17-androstadien-3β-ol by oxidation with simultaneous isomerization of the 5(6)-double bond.
Inventors
- 👤 Henry Laurent
- 👤 Rudolf Wiechert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:43
CPC Classifications
C; C07; C07J; C07J63/00; C07J63/008; A; A61; A61P; A61P3/00; A61P3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A method of treating acne, seborrhea, alopecia or hirsutism in a patient comprising administering an antiandrogenically effective amount of a topically administerable pharmaceutical composition comprising an antiandrogenically effective amount of D-homo-4,17-androstadien-3-one and a pharmaceutically acceptable carrier which is suitable for topical administration, and wherein the concentration of D-homo-4,17-androstadien-3-one is 0.5-5.0 wt. %.
Claim 2
Independent Claim
52 words
A method of treating acne, seborrhea, alopecia or hirsutism in a patient comprising administering an antiandrogenically effective amount of a topically administerable pharmaceutical composition comprising an antiandrogenically effective amount of D-homo-4,17-androstadien-3-one and a pharmaceutically acceptable carrier which is suitable for topical administration, and wherein the concentration of D-homo-4,17-androstadien-3-one is 0.5-5.0 wt. %.
References Cited (Backward Citations)
US3492338A
Cited
US3984476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |