US2846289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High luster polyamide filaments and process for producing them
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1956-12-17
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Granted: 1958-08-05
•
Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Gray John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:58
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; D01F11/00; D01F11/04; D01F11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS FOR THE PRODUCTION OF POLYAMIDE FILAMENTS COMPRISING THE STEPS OF EXTRUDING A MOLTEN SYNTHETIC LINEAR POLYAMIDE, AND QUENCHING THE EXTRUDED POLYAMIDE BY CONTACT WITH A LIQUID HAVING SUBSTANTIALLY NO SOLVENT ACTION ON THE POLYMER AND MAINTAINED AT A TEMPERATURE BELOW -5*C.
Claim 2
Dependent Claim
43 words
A PROCESS FOR THE PRODUCTION OF POLYAMIDE FILAMENTS COMPRISING THE STEPS OF EXTRUDING A MOLTEN SYNTHETIC LINEAR POLYAMIDE, AND QUENCHING THE EXTRUDED POLYAMIDE BY CONTACT WITH A LIQUID HAVING SUBSTANTIALLY NO SOLVENT ACTION ON THE POLYMER AND MAINTAINED AT A TEMPERATURE BELOW -5*C.
References Cited (Backward Citations)
US2157117A
Cited
US2324397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |