US3776940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermediates for producing prostaglandins
Assignee: Individual
•
Filing: 1972-08-17
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Granted: 1973-12-04
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Expires: 1992-08-17
Abstract
Abstract PROSTAGLANDIN F1A, PROSTAGLANDIN F1B, AND ANALOGS OF THOSE ARE PRODUCED FROM BICYCLO(3.1.0)HEXANE INTERMEDIATES.
Inventors
- 👤 G Just
- 👤 C Simonovitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:01
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/10; C07D295/112; C07D295/116; C07C; C07C35/00; C07C35/22; C07C35/23; C07C35/27; C07C405/00; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/12
Claims Analysis
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |