US2771476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
11alpha-acyloxy-17alpha-halo-4-pregnene-3, 20-dione and process
Assignee: Pharmacia and Upjohn Co
•
Filing: 1953-08-27
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Granted: 1956-11-20
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Expires: 1973-08-27
Abstract
No abstract record available.
Inventors
- 👤 Douglas A Lyttle
- 👤 Robert H Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:54
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
AN 11A - ACYLOXY - 17A - HALO - 4 - PREGNENE - 3,20DIONE OF THE FORMULA:
Claim 2
Dependent Claim
17 words
AN 11A - ACYLOXY - 17A - HALO - 4 - PREGNENE - 3,20DIONE OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |