US3336428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of wet spun fibers
Assignee: Union Carbide Corp
•
Filing: 1963-02-18
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Granted: 1967-08-15
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 Andrew T Walter
- 👤 Jr Ronald S Wishart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:05
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/40; D01D; D01D5/00; D01D5/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
IN A PROCESS FOR THE PRODUCTION OF POLYMERIC FILAMENTS BY WET SPINNING WHICH COMPRISES EXTRUDING A POLYMERIC FILAMENT RAW MATERIAL SPINNING SOSLUTION THROUGH A SPINNERETTE INTO A COAGULATING BATH CAPABLE OF COAGULATING THE POLYMERIC FILAMENT RAW MATERIAL INTO A SOLID FILAMENT FROM WHICH CAN THEN BE REMOVED FROM THE COAGULATING BATH FOR SUBSEQUENT PROCESSING, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE POLYMERIC FILAMENT RAW MATERIAL SPINNING SOLUTION EXTRUDED FROM A SPINNERETTE WITH A COAGULATING SOLUTION CONTAINING AT LEAST 0.005 WEIGHT PRECENT OF AN ORGANOSILOXANE-OXYALKYLENE BLOCK COPOLYMER COMPRISING (A) AT LEAST ONE SILOXANE BLOCK CONTAINING AT LEAST TWO SILOXANE UNITS REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
102 words
IN A PROCESS FOR THE PRODUCTION OF POLYMERIC FILAMENTS BY WET SPINNING WHICH COMPRISES EXTRUDING A POLYMERIC FILAMENT RAW MATERIAL SPINNING SOSLUTION THROUGH A SPINNERETTE INTO A COAGULATING BATH CAPABLE OF COAGULATING THE POLYMERIC FILAMENT RAW MATERIAL INTO A SOLID FILAMENT FROM WHICH CAN THEN BE REMOVED FROM THE COAGULATING BATH FOR SUBSEQUENT PROCESSING, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE POLYMERIC FILAMENT RAW MATERIAL SPINNING SOLUTION EXTRUDED FROM A SPINNERETTE WITH A COAGULATING SOLUTION CONTAINING AT LEAST 0.005 WEIGHT PRECENT OF AN ORGANOSILOXANE-OXYALKYLENE BLOCK COPOLYMER COMPRISING (A) AT LEAST ONE SILOXANE BLOCK CONTAINING AT LEAST TWO SILOXANE UNITS REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
15 words
THE PROCESS OF CLAIM 1 WHEREIN THE POLYMERIC FILAMENT RAW MATERIAL IS AN ACRYLONITRILE POLYMER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |