US2849448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroid compounds
Assignee: Pharmacia and Upjohn Co
•
Filing: 1957-08-09
•
Granted: 1958-08-26
•
Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 George B Spero
- 👤 John L Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:35
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A MEMBER OF THE GROUP CONSISTING OF 5A,11-DIHYDROXY-6B,11-DIMETHYLALLOPREGNANE-3,20-DIONE, 3,20-BIS(LOWER-ALKYLENE) KETAL; 5A,11-DIHYDROXY-6B,11-DIMETHYLALLOPREGNANE-3,20-DIONE; NS 6A,11-DEMETHYL-11-HYDROXYPROGESTERONE.
Claim 2
Dependent Claim
13 words
A MEMBER OF THE GROUP CONSISTING OF 5A,11-DIHYDROXY-6B,11-DIMETHYLALLOPREGNANE-3,20-DIONE, 3,20-BIS(LOWER-ALKYLENE) KETAL; 5A,11-DIHYDROXY-6B,11-DIMETHYLALLOPREGNANE-3,20-DIONE; NS 6A,11-DEMETHYL-11-HYDROXYPROGESTERONE.
References Cited (Backward Citations)
US2752369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |