US2606913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic b ring steroids
Assignee: Pharmacia and Upjohn Co
•
Filing: 1950-11-20
•
Granted: 1952-08-12
•
Expires: 1970-11-20
Abstract
No abstract record available.
Inventors
- 👤 Robert H Levin
- 👤 Jr A Vern Mcintosh
- 👤 George B Spero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:26
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A 1-METHYL - 10 - NORMETHYL - 3 - ACYLOXY 5,7,9(10)-PREGNATRIEN-11,20-DIONE OF THE FORMULA:
Claim 2
Dependent Claim
14 words
A 1-METHYL - 10 - NORMETHYL - 3 - ACYLOXY 5,7,9(10)-PREGNATRIEN-11,20-DIONE OF THE 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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |