Patent US3729527A successfully refreshed from Google Patents.
US3729527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polymer blends of polyamides and polyarylsulfones
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-04-28
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Granted: 1973-04-24
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Expires: 1991-04-28
Abstract
Abstract THERMOPLASTIC POLYMER BLENDS WHICH CONTAIN FROM 99% TO 1% OF ONE OR MORE AROMATIC POLYSULPHONES AND AND 1% TO 99% OF ONE OR MORE THERMOPLASTIC POLYAMIDES HAVING A DESIRABLE COMBINATION OF PHYSICAL PROPERTIES AND IN PARTICULAR BETTER FLOW PROPERTIES IN THE MELT THAN THE POLYSULPHONES THEMSELVES.
Inventors
- 👤 E Nield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:08
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/06; C08L77/02; C08L81/00; C08L81/06
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |