Patent US2799688A successfully refreshed from Google Patents.
US2799688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroids
Assignee: Pharmacia and Upjohn Co
•
Filing: 1954-12-17
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Granted: 1957-07-16
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Expires: 1974-12-17
Abstract
No abstract record available.
Inventors
- 👤 Robert W Jackson
- 👤 John A Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:15
CPC Classifications
C; C07; C07J; C07J31/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
LOWER - ALKYL 3-KETO 11A -SULFONYLOXY-4,17(20)PREGENADINE-21-OATES REPRESENTS BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
11 words
LOWER - ALKYL 3-KETO 11A -SULFONYLOXY-4,17(20)PREGENADINE-21-OATES REPRESENTS BY THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2409798A
Cited
US2695906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |