Patent US3576864A successfully refreshed from Google Patents.
US3576864A
Expired / Lapsed
US
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(trifluoromethyl-phenyl)semicarbazines
Assignee: BASF Schweiz AG
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Filing: 1967-07-31
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Granted: 1971-04-27
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Expires: 1987-07-31
Abstract
Abstract SEMICARBAZIDES OF THE FORMULA AR-(NH)2-CO-N(-R2)-R1 IN WHICH AR REPRESENTS A PHENYL GROUP SUBSTITUTED BY AT LEAST ONE TRIFLUOROMETHYL GROUP, AND R1 AND R2 EACH REPRESENTS HYDROGEN OR AN ORGANIC RADICAL OR, WHEN TAKEN TOGETHER, A BIVALENT ORGANIC RADICAL, OR ALTS THEREOF, HAVING UTILITY AS ANTICONVULSANTS.
Inventors
- 👤 Kuppuswamy Nagarajan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:09
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/21; A61K31/26; A61K31/16; A61K31/17; A61K31/175; C; C07; C07C; C07C281/00; C07C281/06
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |