US3654342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant agents for thermoplastic products
Assignee: Wyeth Holdings LLC
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Filing: 1968-08-19
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Granted: 1972-04-04
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Expires: 1988-08-19
Abstract
Abstract COMPOUNDS USEFUL AS FLAME-RETARDING AGENTS AND HAVING THE FORMULA R5-P(+)(-R6)(-R7)-R4 .Y(-) WHEREIN R4 IS CARBOXYALKENYL, CARBOALKOXYALKENYL OR 2CYANOETHYL, R5, R6 AND R7, ARE INDIVIDUALLY ALKYL; ALKENYL; CYANO, HYDROXY, OR CARBOXY SUBSTITUTED ALKYL; ARYL; ARALKYL; VINYL, HALO, POLYHALO, OR NITRO AR-SUBSTITUTED ARALKYL; DIALKYLAMINOALKYL OR CARBOALKOXYALKYL RADICALS AND Y IS ALKYLAMINOALKYL OR CARBOALKOZYALKYL RADICALS AND Y IS BROMINE OR CHLORINE, R5, R6 AND R7 BEING 2-CYANOETHYL AND Y BEING BROMINE WHEN R4 IS 2-CYANOETHYL AND AT LEAST ONE OF R5, R6 AND R7 BEING CYANO SUBSTITUTED ALKYL WHEN R4 IS CARBOXYALKENYL OR CARBOALKOYALKENYL, ARE DISCLOSED.
Inventors
- 👤 Helen Currier Gillham
- 👤 Allan Ellis Sherr
- 👤 Harvey Gerald Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/50; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |