Patent US3457342A successfully refreshed from Google Patents.
US3457342A
Expired / Lapsed
US
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Method and apparatus for spinning heterofilaments
Assignee: Imperial Chemical Industries Ltd
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Filing: 1966-12-05
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Granted: 1969-07-22
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Expires: 1986-12-05
Abstract
No abstract record available.
Inventors
- 👤 William G Parr
- 👤 Alfred W D Hudgell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:28
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR THE MANUFACTURE OF A CONJUGATE FILAMENT FROM AT LEAST TWO DIFFERENT SUBSTANCES AT LEAST ONE OF WHICH IS FIBRE-FORMING COMPRISING SUPPLYING THE SUBSTANCES AS VISCOUS MELTS OR SOLUTIONS TO A CONFINED REGION TO FORM THEREIN SHALLOW SUPERPOSED LAYERS LYING ABOVE AND ADJACENT A SPINNERET ASSEMBLY CONTAINING A SPINNERET PLATE, AND EXTRUDING THE SAID SUBSTANCES THROUGH AT LEAST ONE EXTRUSION ORIFICE AS COMPOSIT STREAMS TO FORM SHEATHCORE FILAMENTS WHICH ARE SUBSEQUENTLY COLLECTED, THE UPPER LAYER FORMING THE CORE OF SAID FILAMENT.
Claim 2
Dependent Claim
83 words
A PROCESS FOR THE MANUFACTURE OF A CONJUGATE FILAMENT FROM AT LEAST TWO DIFFERENT SUBSTANCES AT LEAST ONE OF WHICH IS FIBRE-FORMING COMPRISING SUPPLYING THE SUBSTANCES AS VISCOUS MELTS OR SOLUTIONS TO A CONFINED REGION TO FORM THEREIN SHALLOW SUPERPOSED LAYERS LYING ABOVE AND ADJACENT A SPINNERET ASSEMBLY CONTAINING A SPINNERET PLATE, AND EXTRUDING THE SAID SUBSTANCES THROUGH AT LEAST ONE EXTRUSION ORIFICE AS COMPOSIT STREAMS TO FORM SHEATHCORE FILAMENTS WHICH ARE SUBSEQUENTLY COLLECTED, THE UPPER LAYER FORMING THE CORE OF SAID FILAMENT.
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |