US2991295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
11beta-hydroxy-17alpha-alkyl estrogens and intermediates in the production thereof
Assignee: Pharmacia and Upjohn Co
•
Filing: 1956-08-21
•
Granted: 1961-07-04
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Expires: 1976-08-21
Abstract
No abstract record available.
Inventors
- 👤 Barney J Magerlein
- 👤 John A Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:20
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
AN UNSATURATED 3-ETHERIFIED 17A-ALKYLESTRANE-3, 11B, 17B-TRIOL SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULAE
Claim 2
Dependent Claim
16 words
AN UNSATURATED 3-ETHERIFIED 17A-ALKYLESTRANE-3, 11B, 17B-TRIOL SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULAE
References Cited (Backward Citations)
US2735854A
Cited
US2744122A
Cited
US2655518A
Cited
US2753342A
Cited
US2774775A
Cited
US2698855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |