US3728138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant and intumescent compositions
Assignee: Zeneca Inc
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Filing: 1971-01-05
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Granted: 1973-04-17
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Expires: 1991-01-05
Abstract
Abstract NOVEL ADJUVANTS AND COMBINATIONS THEREOF ARE PROVIDED WHICH HAVE THE POPERTIES OF IMPORTING FLAME-RETRADANCY AND INTUMESCENCE TO POLYMERIC MATERIALS. THE NEW ADJUVANTS COMPRISE HALOGENATED AND PHOSPHORUSCONTAINING ADJUVANTS OF DIALLYL CHLORENDATE AND MINERAL ACID SALTS OF PHENYLBIGUANIDINE DERIVATIVES. THE LATTER MAY BE ADVANTAGEOUSLY COMBINED WITH A WIDE VARIETY OF PHOSPHORUS-CONTAINING COMPOUNDS, INCLUDING ESPECIALLY, NOVEL DIALLYL CHLORENDATE DERIVATIVES TO PROVIDE INTUMESCENT FILMS AND COATINGS.
Inventors
- 👤 E Kuehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:13
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0023; C07; C07C; C07C279/00; C07C279/20; C07C279/24; C07C279/26; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4025; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/12; C08K5/16; C08K5/29; C08K5/31; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5337; C09; C09D; C09D131/00; C09D131/02; C09D131/04; C09D5/00; C09D5/18; C09D5/185; C08J2375/00; C08J2375/04
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |