US4235893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester derivatives of 4-hydroxy-4-androstene-3,17-dione and a method for inhibiting estrogen biosynthesis
Assignee: Individual
•
Filing: 1978-05-08
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Granted: 1980-11-25
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Expires: 1998-05-08
Abstract
Abstract This invention relates to ester derivatives of 4-hydroxy-4-androstene-3,17-dione (4-OH-4-A), including the acetate, heptanoate, dodecanoate, hemisuccinate and benzoate esters of 4-OH-4-A. This invention also relates to a method of using the esters in the inhibition of estrogen biosynthesis.
Inventors
- 👤 Angela M. H. Brodie
- 👤 Harry J. Brodie
- 👤 David A. Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:51
CPC Classifications
C; C07; C07J; C07J1/00; C07J1/0003; C07J1/0011
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
36 words
A method of inhibiting estrogen biosynthesis using as an inhibitor a compound having the general formula ##STR4## wherein R is selected from the group consisting of straight-chain, saturated monocarboxylates containing 2-12 carbon atoms; hemisuccinate; and benzoate.
Claim 2
Independent Claim
36 words
A method of inhibiting estrogen biosynthesis using as an inhibitor a compound having the general formula ##STR4## wherein R is selected from the group consisting of straight-chain, saturated monocarboxylates containing 2-12 carbon atoms; hemisuccinate; and benzoate.
Claim 3
Dependent Claim
10 words
A method as in claim 1, wherein R is acetate.
Claim 4
Dependent Claim
10 words
A method as in claim 1, wherein R is heptanoate.
Claim 5
Dependent Claim
10 words
A method as in claim 1, wherein R is dodecanoate.
Claim 6
Dependent Claim
10 words
A method as in claim 1, wherein R is hemisuccinate.
Claim 7
Dependent Claim
10 words
A method as in claim 1, wherein R is benzoate.
References Cited (Backward Citations)
US3060201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |