US2993018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of coloured filaments, threads and the like from viscose
Assignee: Files de Calais SA
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Filing: 1959-01-06
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Granted: 1961-07-18
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Expires: 1979-01-06
Abstract
No abstract record available.
Inventors
- 👤 Steinlin Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/12; D01F2/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR THE PRODUCTION OF COLORED REGENERATED CELLULOSE THREADS BY THE VISCOSE PROCESS WHICH COMPRISES DISPERSING A PIGMENT IN A AQUEOUS SOLUTION CONTAINING IN SOLUTION, AS THE SOLE DISPERSING AGENT FOR THE PIGMENT, A WATER-SOLUBLE SALT OF A POLYMER CHOSEN FROM THE GROUP CONSISTING OF THE SODIUM, POTASSIUM AND AMMONIUM SALTS OF POLYACRYLIC ACID AND OF POLYMETHACRYLIC ACID, INJECTING THE PIGMENT DISPERSION SO PRODUCED INTO A MAIN STREAM OF SPINNING VISCOSE AND IMMEDIATELY THEREAFTER EXTRUDING THE MIXTURE OF SPINNING VISCOSE AND DISPERSED PIGMENT DIRECTLY INTO A COAGULATING BATH.
Claim 2
Dependent Claim
89 words
A PROCESS FOR THE PRODUCTION OF COLORED REGENERATED CELLULOSE THREADS BY THE VISCOSE PROCESS WHICH COMPRISES DISPERSING A PIGMENT IN A AQUEOUS SOLUTION CONTAINING IN SOLUTION, AS THE SOLE DISPERSING AGENT FOR THE PIGMENT, A WATER-SOLUBLE SALT OF A POLYMER CHOSEN FROM THE GROUP CONSISTING OF THE SODIUM, POTASSIUM AND AMMONIUM SALTS OF POLYACRYLIC ACID AND OF POLYMETHACRYLIC ACID, INJECTING THE PIGMENT DISPERSION SO PRODUCED INTO A MAIN STREAM OF SPINNING VISCOSE AND IMMEDIATELY THEREAFTER EXTRUDING THE MIXTURE OF SPINNING VISCOSE AND DISPERSED PIGMENT DIRECTLY INTO A COAGULATING BATH.
References Cited (Backward Citations)
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US2234734A
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US2337398A
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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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |