US3645964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant acrylonitrile polymer compositions
Assignee: Great Lakes Chemical Corp
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Filing: 1969-07-16
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Granted: 1972-02-29
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Expires: 1989-07-16
Abstract
Abstract FILMS OR FIBERS FORMED FROM AN ACRYLONITRILE POLYMER ARE RENDERED FLAME RETARDANT BY TREATING THE POLYMERIC MATERIAL WITH A CHLORINE-CONTAINING HYDROCARBON SUCH AS A CHLORINE-CONTAINING ALKYL PHOSPHATE OR PHOSPHONATE, AND A BROMINE-CONTAINING PHOSPHATE ESTER SUCH AS TRIS (2,3-DIBROMOPROPYL) PHOSPHATE, THE MOLAR PROPORTION OF BR TO CL IN THE TREATED POLYMER RANGING FROM 3:1 TO 1:3.
Inventors
- 👤 Joseph Di Pietro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:21
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5337
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |