US3706826A
Expired / Lapsed
US
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Melt spinning process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-05-21
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Granted: 1972-12-19
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Expires: 1990-05-21
Abstract
Abstract A METHOD FOR DECREASING THE BIREFRINGENCE OF A MELT SPUN FILAMENT BY APPLYING A FORWARDING FORCE TO A FILAMENTARY STREAM IN A REGION WHERE THE FILAMENT IS IN AN INTERMEDIATE PLASTIC STATE, THE FORWARDING FORCE BEING SUFFICIENTLY SMALL SUCH THAT THE FILAMENT IS UNDER POSITIVE TENSION THROUGHOUT THE PROCESS SEQUENCE.
Inventors
- 👤 James Duncan Bremner
- 👤 Iain Alexander Mclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:57
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D5/098; D01D5/0985; D01F; D01F6/00; D01F6/58; D01F6/62
Claims Analysis
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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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |