US3071808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt-spinning synthetic polymer filaments
Assignee: British Nylon Spinners Ltd
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Filing: 1961-05-29
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Granted: 1963-01-08
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Mackinnon Hugh Marquis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:46
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/10; D01D1/103; D01D1/106; D01D5/00; D01D5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
PROCESS FOR MELT-SPINNING SYNTHETIC POLYMER FILAMENTS COMPRISING THE STEPS OF INITIALLY EXPELLING AIR FROM AN UNUSED PACK OF A MELT-SPINNING UNIT, FORWARDING MOLTEN POLYMER UNDER PRESSURE TO THE PACK TO COMMENCE SPINNING THROUGH SAID UNIT, MAINTAINING THE PACK SUBSTANTIALLY FREE OF AIR AND ITS CONSTITUENT GASES UNTIL ALL THE FILAMENTS HAVE FULLY EMERGED FROM THE SPINNERET ORIFICES OF THE PACK, AND THEN EXTRUDING THE MOLTEN POLYMER THROUGH SAID ORIFICES IN THE FORM OF CONTINUOUS FILAMENTS.
Claim 2
Dependent Claim
75 words
PROCESS FOR MELT-SPINNING SYNTHETIC POLYMER FILAMENTS COMPRISING THE STEPS OF INITIALLY EXPELLING AIR FROM AN UNUSED PACK OF A MELT-SPINNING UNIT, FORWARDING MOLTEN POLYMER UNDER PRESSURE TO THE PACK TO COMMENCE SPINNING THROUGH SAID UNIT, MAINTAINING THE PACK SUBSTANTIALLY FREE OF AIR AND ITS CONSTITUENT GASES UNTIL ALL THE FILAMENTS HAVE FULLY EMERGED FROM THE SPINNERET ORIFICES OF THE PACK, AND THEN EXTRUDING THE MOLTEN POLYMER THROUGH SAID ORIFICES IN THE FORM OF CONTINUOUS FILAMENTS.
References Cited (Backward Citations)
US2278875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |