Patent US2698852A successfully refreshed from Google Patents.
US2698852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroid production
Assignee: Pharmacia and Upjohn Co
•
Filing: 1953-06-05
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Granted: 1955-01-04
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Expires: 1973-06-05
Abstract
No abstract record available.
Inventors
- 👤 Iii Philip F Beal
- 👤 Alan H Nathan
- 👤 John A Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:44
CPC Classifications
C; C07; C07J; C07J31/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
3-BENZYLTHIO-21-ALKOXYOXALYL-3,5-PREGNADIENE-20 ONES REPRESENTED IN THEIR ENOLIC FORM BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
11 words
3-BENZYLTHIO-21-ALKOXYOXALYL-3,5-PREGNADIENE-20 ONES REPRESENTED IN THEIR ENOLIC FORM 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) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |