Patent US3745178A successfully refreshed from Google Patents.
US3745178A
Expired / Lapsed
US
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Process for prostaglandin intermediate
Assignee: Pharmacia and Upjohn Co
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Filing: 1971-07-02
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Granted: 1973-07-10
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Expires: 1991-07-02
Abstract
Abstract EPOXIDATION OF PROSTAGLANDIN A2 COMPOUNDS WITH HYDROGEN PEROXIDE OR AN ORGANIC TERTIARY HYDROPEROXIDE IN THE PRESENCE OF A BASE CONSISTING OF LITHIUM HYDROXIDE, OR A LITHIUM OR MAGNESIUM ALKOXIDE IN A TEMPERATURE RANGE OF -60*C. TO -10*C. YIELD AN INTERMEDIATE USEFUL FOR THE PREPARATION OF PROSTAGLANDIN E2 COMPOUNDS. THE PROSTAGLANDIN PRODUCTS HAVE PHARMACOLOGICAL UTILITY.
Inventors
- 👤 D White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:13
CPC Classifications
C; C07; C07C; C07C405/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |