US2838542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-fluoro steroids and process
Assignee: Pharmacia and Upjohn Co
•
Filing: 1957-11-29
•
Granted: 1958-06-10
•
Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 George B Spero
- 👤 Barney J Magerlein
- 👤 William P Schneider
- 👤 John A Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:37
CPC Classifications
C; C07; C07J; C07J31/00; C07J5/00; C07J7/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 6 - FLUORO - 11B,17A - DIHYDROXY - 1,4 - PREGNADIENE - 3,20DIONE AND 6-FLUORO-17A-HYDROXY-1,4-PREGNADIENE-3,11,20TRIONE.
Claim 2
Dependent Claim
23 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 6 - FLUORO - 11B,17A - DIHYDROXY - 1,4 - PREGNADIENE - 3,20DIONE AND 6-FLUORO-17A-HYDROXY-1,4-PREGNADIENE-3,11,20TRIONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |