US3190855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble steroids and a method for preparing the same
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1962-08-30
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Granted: 1965-06-22
•
Expires: 1982-08-30
Abstract
No abstract record available.
Inventors
- 👤 Miki Takuichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:55
CPC Classifications
C; C08; C08F; C08F8/00; C08F2800/00; C08F2800/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
21-MONOESTER OF PREDNISOLONE WITH A COPOLYMER OF 1 TO 5 PARTS BY WEIGHT OF VINYLPYRROLIDONE AND 1 PART BY WEIGHT OF MALEIC ANHYDRIDE, THE COPOLYMER HAVING A MOLECULAR WEIGHT OF FROM 2000 TO 70,000.
Claim 2
Dependent Claim
34 words
21-MONOESTER OF PREDNISOLONE WITH A COPOLYMER OF 1 TO 5 PARTS BY WEIGHT OF VINYLPYRROLIDONE AND 1 PART BY WEIGHT OF MALEIC ANHYDRIDE, THE COPOLYMER HAVING A MOLECULAR WEIGHT OF FROM 2000 TO 70,000.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |