US2818408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroid compounds and process
Assignee: Pharmacia and Upjohn Co
•
Filing: 1956-03-29
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Granted: 1957-12-31
•
Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 Campbell J Allan
- 👤 John C Babcock
- 👤 John A Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:33
CPC Classifications
C; C07; C07J; C07J13/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
LOWER - ALKYL 3, 7 - DIPYRROLIDYL - 11-KETO-3,5,17(20)-PREGNATRIEN-21-OATE REPRESENTED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
12 words
AN 11B-HYDROXY - 21 - OXY-4,6,17(20)-PREG NATRIEN-3-ONE REPRESENTED BY THE FOLLOWING 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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |