US2673847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroid epoxides
Assignee: Pharmacia and Upjohn Co
•
Filing: 1951-11-09
•
Granted: 1954-03-30
•
Expires: 1971-11-09
Abstract
No abstract record available.
Inventors
- 👤 George B Spero
- 👤 Robert H Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:10
CPC Classifications
C; C07; C07J; C07J71/00; C07J21/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A 3(4),17(20)-DIOXIDE OF A POLY-ENOL ACYLATE OF PREGNANE-3,11,20-TRIONE, WHEREIN THE ACYLOXY GROUPS ARE OF THE FORMULA ACO, AC BEING THE ACYL RADICAL OF A MONOCARBOXYLIC HYDROCARBON ACID CONTAINING FROM ONE TO EIGHT CARBON ATOMS, IN CLUSIVE.
Claim 2
Dependent Claim
36 words
A 3(4),17(20)-DIOXIDE OF A POLY-ENOL ACYLATE OF PREGNANE-3,11,20-TRIONE, WHEREIN THE ACYLOXY GROUPS ARE OF THE FORMULA ACO, AC BEING THE ACYL RADICAL OF A MONOCARBOXYLIC HYDROCARBON ACID CONTAINING FROM ONE TO EIGHT CARBON ATOMS, IN CLUSIVE.
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) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |