US2874173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Estrone compounds
Assignee: Pharmacia and Upjohn Co
•
Filing: 1956-12-17
•
Granted: 1959-02-17
•
Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 John A Hogg
- 👤 Korman Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:02
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
ESTRONE COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
5 words
ESTRONE COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
US2756179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |