US3702810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochemical method for preparing 25-hydroxytachysterol3
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1971-03-02
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Granted: 1972-11-14
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Expires: 1991-03-02
Abstract
Abstract THE NEW COMPOUNDS 25-HDROXYTACHYSTEROL, 25-HYDROXYDIHYDROTACHYSTEROL3 AND METHODS FOR PREPARING SAME. 25-HYDROXYDIHYDROTACHYSTERIOL3 IS CHARACTERIZED BY ANTIRACHITIC ACTIVITY AND BY ITS ABILITY TO INDUCE BONE MOBILIZATION AND THEREBY INCREASE SERUM CALCIUM CONCENTRATION INDICATING ITS APPLICATION FOR THE TREATMENT OF HYPORPARATHYROIDISM. 25-HYDROXYTACHYSTEROL3 IS A VALUABLE INTERMEDIATE IN THE PREPARATION OF 25-HYDROXYDIHYDROTACHYSTEROL3.
Inventors
- 👤 Hector F De Luca
- 👤 Tatsuo Suda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:46
CPC Classifications
C; C07; C07J; C07J75/00; A; A61; A61K; A61K31/00; A61K31/56; A61K31/575; C07J9/00
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |