US3833622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystalline 25-hydroxycholecalciferol hydrate and structurally related compounds
Assignee: Pharmacia and Upjohn Co
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Filing: 1969-03-17
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Granted: 1974-09-03
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Expires: 1989-03-17
Abstract
Abstract THIS INVENTION RELATES TO 25-HYDROXYCHOLECALCIFEROL, A BIOLOGICALLY ACTIVE METABOLITE OF VITAMIN D, AND ESPECIALLY TO ITS HYDRATE AND STRUCTURALLY RELATED COMPOUNDS POSSESSING VITAMIN D ACTIVITES AND USES.
Inventors
- 👤 J Babcock
- 👤 J Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:25
CPC Classifications
C; C07; C07C; C07C401/00; C07C2601/00; C07C2601/12; C07C2601/14; C07C2601/16; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/24
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |