Patent US3812172A successfully refreshed from Google Patents.
US3812172A
Expired / Lapsed
US
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15-methyl and 15-ethyl dihydro-pge1
Assignee: Pharmacia and Upjohn Co
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Filing: 1972-05-24
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Granted: 1974-05-21
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Expires: 1992-05-24
Abstract
Abstract PROSTAGLANDIN 13,14-DIHYDRO -PG1-TYPE AND PG3-TYPE COMPOUNDS WITH A METHYL OR AN ETHYL SUBSTUTUENT AT C-15. THESE ARE USEFUL FOR THE SAME PHARMACOLOGICAL PURPOSES AS THE UNSUBSTITUTED PROSTAGLANDINS.
Inventors
- 👤 Gordon Bundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:12
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07C; C07C405/00
Claims Analysis
Total Claims: 0
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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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |