Patent US3660533A successfully refreshed from Google Patents.
US3660533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant block copolymers
Assignee: Phillips Petroleum Co
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Filing: 1970-07-29
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Granted: 1972-05-02
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Expires: 1990-07-29
Abstract
Abstract EHTYLENE-PROPYLENE BLOCK COPOLYMERS ARE RENDERED FLAME-RESISTANT BY INCORPORATION THEREIN OF A FLAM-RETARDANT SYTEM CONSISTING OF A MIXTURE OF BROMINATED AND CHLORINATED BIS(CYCLOALKENYL) COMPOUNDS AND ANITMONY TRIOXIDE.
Inventors
- 👤 William O Drake
- 👤 Donnie G Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |