US3801333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant and intumescent compositions
Assignee: Zeneca Inc
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Filing: 1972-10-13
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Granted: 1974-04-02
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Expires: 1992-10-13
Abstract
Abstract Novel adjuvants and combinations thereof are provided which have the properties of importing flame-retardancy and intumescence to polymeric materials. The new adjuvants comprise halogenated and phosphorus-containing adjuvants of diallyl chlorendate and mineral acid salts of phenylbiguanidine derivatives. The latter may be advantageously combined with a wide variety of phosphoruscontaining 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
2026-11-08 20:25
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; C09; C09D; C09D5/00; C09D5/18; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
A flame-retardant polyurethane composition containing from about 5% to about 60% by weight of said composition of a flame-retarding agent characterized by the 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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |