Patent US3819770A successfully refreshed from Google Patents.
US3819770A
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US
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Fire retardant thermoplastic polymer compositions
Assignee: Stauffer Chemical Co
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Filing: 1972-11-22
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Granted: 1974-06-25
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Expires: 1992-11-22
Abstract
Abstract SELF-EXTINGUISHING, THERMOPLASTIC POLYMER COMPOSITIONS ARE PREPARED BY THE INTIMATE ADMIXTURE OF A THERMOPLASTIC POLYMER WITH A COPOLYMER OF A HALOGEN CONTAINING ETHYLENICALLY UNSATURATED MONOMER AND A PHOSPHORUS CONTAINING VINYL MONOMER, PARTICULARLY A BIS(HYDROCARBYL) VINYLPHOSPHONATE. THE THUS MODIFIED THERMOPLASTIC POLYMERS DISPLAY A HIGH DEGREE OF FLAME RETARDDANCE WITHOUT ANY SUBSTANTIAL CHANGES IN THEIR PHYSICAL PROPERTIES INCLUDING, FOR EXAMPLE, THEIR CLARITY AND HARDNESS AND THE RESULTING COMPOSITIONS MAY BE SAFELY EMPLOYED IN ANY APPLICATION REQUIRING THEIR POSSIBLE EXPOSURE TO A FIRE OR HIGH TEMPERATURES.
Inventors
- 👤 P Kraft
- 👤 S Altscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:57
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08F; C08F30/00; C08F30/02; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L43/00; C08L43/02; C08L67/00; C08L75/00; C08L75/04; C08L2201/00; C08L2201/02; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L27/08
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |