Patent US3449381A successfully refreshed from Google Patents.
US3449381A
Expired / Lapsed
US
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19-oxo- and 19-lower alkyl-19-oxoandrostane derivatives
Assignee: Roche Palo Alto LLC
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Filing: 1962-06-12
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Granted: 1969-06-10
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Albert Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:06
CPC Classifications
C; C07; C07J; C07J71/00; A; A23; A23K; A23K20/00; A23K20/10; A23K20/168; C07J1/00; C07J5/00; C07J7/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND OF THE FOLLOWING FORMULA
Claim 2
Dependent Claim
6 words
A COMPOUND OF THE FOLLOWING FORMULA
References Cited (Backward Citations)
US3014931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |