Patent US4001219A successfully refreshed from Google Patents.
US4001219A
Expired / Lapsed
US
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Steroidal derivatives of bendazolic acid and process for the preparation of the same
Assignee: Individual
•
Filing: 1976-01-09
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Granted: 1977-01-04
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Expires: 1996-01-09
Abstract
Abstract Esters of [(1-benzyl-1H-indazol-3-yl)-oxy]acetic acid at primary hydroxyl in position 21 of hydrocortisone, cortisone, prednisone and prednisolone, and process for the preparation of the same.
Inventors
- 👤 Leandro Baiocchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:52
CPC Classifications
C; C07; C07J; C07J43/00; C07J43/003; A; A61; A61P; A61P17/00; A61P29/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
16 words
Esters of [(1-benzyl-1H-indazol-3-yl)-oxy]-acetic acid at primary hydroxyl in position 21 of hydrocortisone, cortisone, prednisone and prednisolone.
Claim 2
Dependent Claim
16 words
Esters of [(1-benzyl-1H-indazol-3-yl)-oxy]-acetic acid at primary hydroxyl in position 21 of hydrocortisone, cortisone, prednisone and prednisolone.
Claim 3
Dependent Claim
36 words
Process for the preparation of the esters mentioned in claim 1, characterized by the fact that cortisone, hydrocortisone, prednisone and prednisolone are reacted at room temperature with [(1-benzyl-1H-indazol-3-yl)-oxy]acetyl chloride in the presence of an HCl acceptor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |