US3697559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,25-dihydroxycholecalciferol
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1971-02-25
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Granted: 1972-10-10
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Expires: 1991-02-25
Abstract
Abstract 1,25-Dihydroxycholecalciferol. The compound is characterized by antirachitic activity (vitamin D-like activity) and by its high activity in promoting intestinal calcium absorption indicating a more rapid onset of antirachitic activity.
Inventors
- 👤 Hector F De Luca
- 👤 Heinrich K Schnoes
- 👤 Michael F Holick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:14
CPC Classifications
C; C07; C07C; C07C401/00; C07C2601/00; C07C2601/12; C07C2601/14; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3565924A
Cited
US3585221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |