Patent US2577763A successfully refreshed from Google Patents.
US2577763A
Expired / Lapsed
US
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Wet spinning process
Assignee: Akzo Nobel UK PLC
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Filing: 1949-11-05
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Granted: 1951-12-11
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Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Howard M Hoxie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:56
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A METHOD OF FORMING ARTIFICAL AND SYNTHETIC FIBERS AND OTHER SHAPED ARTICLES WHICH COMPRISES CONTINUOUSLY EXTRUDING A SOLUTION OF THE MATERIAL TO BE SHAPED INTO A SETTING BATH COMPRISING A MIXTURE OF THE SOLVENT AND A LIQUID PRECIPITANT FOR THE MATERIAL, WHICH PRECIPITANT IS AN EXTRACTIVE FOR THE SOLVENT, CONTINUOUSLY WITHDRAWING THE SHAPED ARTICLE FROM THE SETTLING BATH TO THE ATMOSPHERE, CONTINUOUSLY WASHING THE ARTICLE, AS IT EMERGES FROM THE SETTLING BATH AND ABOVE THE LEVEL OF THE SETTLING BATH, WITH A STREAM OF LIQUID FLOWING CONTINUOUSLY AND DIRECTLY INTO THE SETTING BATH COUNTERCURRENTLY TO THE ARTICLE EMERGING FROM THE BATH, SAID WASHING LIQUID CONSISTING OF THE PRECIPITANT, AND, AT MOST, A MINOR PROPORTION OF THE EXTRUSION SOLVENT, AND CONTINUOUSLY CORRELATING THE RELATIVELY PROPORTIONS OF PRECIPITANT AND SOLVENT IN THE LIQUID FLOWING INTO THE SETTING BATH FROM THE WASHING WITH THE AMOUNT OF SOLVENT INTRODUCED INTO THE BATH BY THE SOLUTION OF THE MATERIAL TO BE SHAPED, TO THEREBY MAINTAIN THE RELATIVE PROPORTIONS OF PRECIPITANT AND SOLVENT IN THE SETTING BATH SUBSTANTIALLY CONSTANT FROM THE BEGINNING TO THE END OF EXTRUSION.
Claim 2
Independent Claim
181 words
A METHOD OF FORMING ARTIFICAL AND SYNTHETIC FIBERS AND OTHER SHAPED ARTICLES WHICH COMPRISES CONTINUOUSLY EXTRUDING A SOLUTION OF THE MATERIAL TO BE SHAPED INTO A SETTING BATH COMPRISING A MIXTURE OF THE SOLVENT AND A LIQUID PRECIPITANT FOR THE MATERIAL, WHICH PRECIPITANT IS AN EXTRACTIVE FOR THE SOLVENT, CONTINUOUSLY WITHDRAWING THE SHAPED ARTICLE FROM THE SETTLING BATH TO THE ATMOSPHERE, CONTINUOUSLY WASHING THE ARTICLE, AS IT EMERGES FROM THE SETTLING BATH AND ABOVE THE LEVEL OF THE SETTLING BATH, WITH A STREAM OF LIQUID FLOWING CONTINUOUSLY AND DIRECTLY INTO THE SETTING BATH COUNTERCURRENTLY TO THE ARTICLE EMERGING FROM THE BATH, SAID WASHING LIQUID CONSISTING OF THE PRECIPITANT, AND, AT MOST, A MINOR PROPORTION OF THE EXTRUSION SOLVENT, AND CONTINUOUSLY CORRELATING THE RELATIVELY PROPORTIONS OF PRECIPITANT AND SOLVENT IN THE LIQUID FLOWING INTO THE SETTING BATH FROM THE WASHING WITH THE AMOUNT OF SOLVENT INTRODUCED INTO THE BATH BY THE SOLUTION OF THE MATERIAL TO BE SHAPED, TO THEREBY MAINTAIN THE RELATIVE PROPORTIONS OF PRECIPITANT AND SOLVENT IN THE SETTING BATH SUBSTANTIALLY CONSTANT FROM THE BEGINNING TO THE END OF EXTRUSION.
References Cited (Backward Citations)
US2236648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |