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US3740402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 2-(0-sulfonamidophenyl)-4(3h)-quinazolinones
Assignee: Wyeth Holdings LLC
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Filing: 1971-03-01
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Granted: 1973-06-19
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Expires: 1991-03-01
Abstract
Abstract FLUORESCENT COMPOSITIONS WHICH ARE NOT VISIBLE UNDER ORDINARY LIGHT, SAID COMPOSITIONS HAVING ORGANIC QUINAZOLONE COMPOUNDS AS THE FLUORESCENT COMPONENT.
Inventors
- 👤 A Cevasco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:00
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C07; C07D; C07D265/00; C07D265/04; C07D265/12; C07D265/14; C07D265/20; C07D265/22
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |