US2643252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3, 8-bis-(trifluoromethyl)-benzo(c) cinnoline and nu-oxides thereof
Assignee: Sprague Electric Co
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Filing: 1951-09-25
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Granted: 1953-06-23
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Expires: 1971-09-25
Abstract
No abstract record available.
Inventors
- 👤 Sidney D Ross
- 👤 Kuntz Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:00
CPC Classifications
C; C07; C07D; C07D237/00; C07D237/26; C07D237/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
8 words
A COMPOUND CONFORMING TO THE FOLLOWING GENERAL FORMULA
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |