Patent US3720643A successfully refreshed from Google Patents.
US3720643A
Expired / Lapsed
US
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Fire retardant polymeric materials
Assignee: Motors Liquidation Co
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Filing: 1971-06-21
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Granted: 1973-03-13
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Expires: 1991-06-21
Abstract
Abstract THE ADDITION OF SUITABLE MINOR PORTIONS OF TALC, CHLORINATED POLYETHYLENE AND ANTIMONY TRIOXIDE TO POLYPROPYLENE RESINS, STYRENE-ACRYLONITRILE COPOLYMER RESINS OR ACRYLONITRILE-BUTADIENE-STYRENE RESINS RENDERS THESE POLYMERS NONBURNING. THE PRESENCE OF THE TALC CONTRIBUTES SYNERGISTICALLY TO THE FLAME RETARDANCY OF THE COMPOSITIONS PERMITTING A REDUCTION IN THE QUANTITIES OF THE CHLORINE-CONTAINING AND ANTIMONY-CONTAINING ADDITIVES OTHERWISE EMPLOYED FOR THIS PURPOSE.
Inventors
- 👤 Isa I Abu
- 👤 H Trexler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:58
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08K; C08K3/00; C08K3/34; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L55/00; C08L55/02; C08L23/26; C08L23/28; C08L23/286
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |