US3792113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polymers containing post chlorinated vinyl halide-bis(hydrocarbyl)vinyl phosphonate copolymers
Assignee: Stauffer Chemical Co
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Filing: 1972-09-21
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Granted: 1974-02-12
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Expires: 1992-09-21
Abstract
Abstract THERE ARE DISCLOSED POST-CHLORINATED COPOLYMERS OF: (1) ONE OR MORE VINYL HALIDE; (2) ONE OR MORE BIS(HYDRACARBYL) VINYLPHOSPHONATES; AND (3) AS AN OPTIONAL COMPONENT ONE OR MORE ETHYLENICALLY UNSATURATED MONOMERS. THESE POST-CHLORINATED PRODUCTS HAVE A HIGHER GLASS TRANSITION TEMPERATURE THAN THE COPOLYMERS FROM WHICH THEY ARE DERIVED AND ARE, THEREFORE, OF GREATER UTILITY IN MANY APPLICATION SUCH, FOR EXAMPLE, AS IN THE PREPARATION OF POLYBLENDS WITH BURNING THERMOPLASTICS WHEREIN THEY IMPART A SIGNIFICANT DEGREE OF FLAME RETARDANCE WITHOUT CAUSING SUBSTANTIAL REDUCTION IN THE HEAT DISTORTION TEMPERATURE OF THE RESULTING POLYBLENDS.
Inventors
- 👤 J Goswami
- 👤 J Jin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:40
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; C08L; C08L101/00
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |