Patent US3309387A successfully refreshed from Google Patents.
US3309387A
Expired / Lapsed
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19-lower alkyl androstanes and pregnanes
Assignee: F Hoffmann La Roche AG
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Filing: 1964-07-01
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Granted: 1967-03-14
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Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Furst Andor
- 👤 Herzog Ernest Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:15
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/57; A61K31/565; A61K31/568; A61K31/5685; C; C07; C07J; C07J1/00; C07J5/00; C07J7/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |