US3129272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt-spinning synthetic polymer filaments
Assignee: British Nylon Spinners Ltd
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Filing: 1961-04-28
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Granted: 1964-04-14
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Expires: 1981-04-28
Abstract
No abstract record available.
Inventors
- 👤 Ferrier Duncan Cameron
- 👤 Parr William Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:31
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/02; D01D5/00; D01D5/08; Y; Y10; Y10S; Y10S425/00; Y10S425/815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A MELT-SPINNING PROCESS OF THE TYPE IN WHICH MOLTEN SYNTHETIC LINEAR POLYMER IS DELIVERED FROM A SOURCE THEREOF TO AND THROUGH A SPINNERET PACK WHICH INCLUDES A SPINNERET PLATE HAVING EXTRUSION ORIFICES THEREIN, THE IMPROVEMENT WHICH COMPRISES: SUPPLYING AN INERT GAS UNDER PRESSURE TO THE EXTERIOR OF SAID SPINNERET PACK AT A LOCATION UPSTREAM OF SAID SPINNERET PLATE; GUIDING AND DISPERSING THE INERT GAS ALONG SAID PACK TO THE VICINITY OF SAID PLATE AND AROUND THE PERIPHERY OF SAID PLATE TO FORM A SUBSTANTIALLY UNBROKEN STREAM FOR FLOWING ACROSS THE FACE THEREOF; AND FLOWING THE UNBROKEN STREAM ACROSS THE FACE OF SAID PLATE TO FORM AND MAINTAIN A HOMOGENEOUS AND LATERALLY UNCONFINED SHALLOW LAYER OF THE INERT GAS IN CONTACT WITH THE ENTIRE SURFACE AREA OF SAID PLATE.
Claim 2
Dependent Claim
129 words
IN A MELT-SPINNING PROCESS OF THE TYPE IN WHICH MOLTEN SYNTHETIC LINEAR POLYMER IS DELIVERED FROM A SOURCE THEREOF TO AND THROUGH A SPINNERET PACK WHICH INCLUDES A SPINNERET PLATE HAVING EXTRUSION ORIFICES THEREIN, THE IMPROVEMENT WHICH COMPRISES: SUPPLYING AN INERT GAS UNDER PRESSURE TO THE EXTERIOR OF SAID SPINNERET PACK AT A LOCATION UPSTREAM OF SAID SPINNERET PLATE; GUIDING AND DISPERSING THE INERT GAS ALONG SAID PACK TO THE VICINITY OF SAID PLATE AND AROUND THE PERIPHERY OF SAID PLATE TO FORM A SUBSTANTIALLY UNBROKEN STREAM FOR FLOWING ACROSS THE FACE THEREOF; AND FLOWING THE UNBROKEN STREAM ACROSS THE FACE OF SAID PLATE TO FORM AND MAINTAIN A HOMOGENEOUS AND LATERALLY UNCONFINED SHALLOW LAYER OF THE INERT GAS IN CONTACT WITH THE ENTIRE SURFACE AREA OF SAID PLATE.
References Cited (Backward Citations)
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US2841821A
Cited
US2821744A
Cited
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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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |