US2683722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroid alkali-metal enolates
Assignee: Pharmacia and Upjohn Co
•
Filing: 1952-01-23
•
Granted: 1954-07-13
•
Expires: 1972-01-23
Abstract
No abstract record available.
Inventors
- 👤 John A Hogg
- 👤 Alan H Nathan
- 👤 Jr Frank Harris Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:11
CPC Classifications
C; C07; C07J; C07J9/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A 21 - ALKOXYOXALYL - 3 - HYDROXYPREGNANE11,20-DIONE ALKALI-METAL ENOLATE, WHEREIN THE ALKYL RADICAL OF THE ALKOXY GROUP CONTAINS FROM ONE TO EIGHT CARBON ATOMS, INCLUSIVE.
Claim 2
Dependent Claim
26 words
A 21 - ALKOXYOXALYL - 3 - HYDROXYPREGNANE11,20-DIONE ALKALI-METAL ENOLATE, WHEREIN THE ALKYL RADICAL OF THE ALKOXY GROUP CONTAINS FROM ONE TO EIGHT CARBON ATOMS, INCLUSIVE.
References Cited (Backward Citations)
US2265417A
Cited
US2541104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |