US3814792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for shaping aliphatic polyamide composition
Assignee: Teijin Ltd
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Filing: 1971-03-22
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Granted: 1974-06-04
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Expires: 1991-03-22
Abstract
Abstract A PROCESS FOR SHAPING A POLYMER COMPOSITION BY DISSOLVING AN ALIPHATIC POLYAMIDE OR A BLEND OF AN ALIPHATIC POLYAMIDE AND A HYDROPHALIC POLYMER IN A MIXED SOLVENT OF AN ALIPHATE ALCOHOL HAVING 1 TO 4 CARBON ATOMS AND WATER (THE ALCOHOL BEING 15 TO 80% BY WEIGHT) AT AN ELEVATED PRESSURE AT A TEMPERATURE OF AT LEAST 130* C. TO FROM A POLYMER SOLUTION HAVING A POLYMER CONCENTRATIONOF 25 TO 80% BY WEIGHT, AND EXTRUDING THE SOLUTION INTO THE ATMOSPHERE AT AN EXTRUSION TEMPERATURE OF 115 TO 155* C.
Inventors
- 👤 T Arakawa
- 👤 Y Kuroda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:25
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; C; C08; C08L; C08L77/00; C08L77/02; D01F6/78; D01F6/80; D01F6/88; D01F6/90
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |