Patent US2783158A successfully refreshed from Google Patents.
US2783158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of coloured filaments, fibres, threads, and the like
Assignee: Akzo Nobel UK PLC
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Filing: 1952-11-25
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Granted: 1957-02-26
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Expires: 1972-11-25
Abstract
No abstract record available.
Inventors
- 👤 Entwistle Donald
- 👤 Robertson Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:33
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; D01D1/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE PRODUCTION OF COLORED VISCOSE RAYON THREADS COMPRISING FORMING A VISCOSE SOLUTION, FORMING A VISCOUS AQUEOUS SOLUTION AGEING SAID VISCOSE SOLUTION TO RENDER IT SUITABLE FOR SPINNING OF SODIUM CARBOXY METHYL CELLULOSE, DISPERSING A WATER-INSOLUBLE COLORING MATTER IN SAID VISCOUS SOLUTION, INJECTING SAID VISCOUS SOLUTION CONTAINING THE COLORING MATTER INTO THE AGED VISCOSE JUST PRIOR TO SPINNING AND EXTRUDING THE MIXTURE OF VISCOSE AND VISCOUS SOLUTION INTO A COAGULATING BATH.
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE PRODUCTION OF COLORED VISCOSE RAYON THREADS COMPRISING FORMING A VISCOSE SOLUTION, FORMING A VISCOUS AQUEOUS SOLUTION AGEING SAID VISCOSE SOLUTION TO RENDER IT SUITABLE FOR SPINNING OF SODIUM CARBOXY METHYL CELLULOSE, DISPERSING A WATER-INSOLUBLE COLORING MATTER IN SAID VISCOUS SOLUTION, INJECTING SAID VISCOUS SOLUTION CONTAINING THE COLORING MATTER INTO THE AGED VISCOSE JUST PRIOR TO SPINNING AND EXTRUDING THE MIXTURE OF VISCOSE AND VISCOUS SOLUTION INTO A COAGULATING BATH.
References Cited (Backward Citations)
GB231808A
Cited
US1984303A
Cited
US2039708A
Cited
US2136201A
Cited
GB503349A
Cited
US2690398A
Cited
US2706689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |