US2679450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of textile materials
Assignee: Acordis UK Ltd
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Filing: 1952-02-01
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Granted: 1954-05-25
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Expires: 1972-02-01
Abstract
No abstract record available.
Inventors
- 👤 Hampson Noel Arthur
- 👤 Downing John
- 👤 Drewitt James Gordon Napier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:31
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
PROCESS FOR THE MANUFACTURE OF ARTIFICIAL TEXTILE MATERIALS OF A PURELY SYNTHETIC SUBSTANCE AND CHARACTERIZED BY HAVING A HIGH DEGREE OF DIMENSIONAL STABILITY AT TEMPERATURES ABOVE 150* C., WHICH COMPRISES FORMING FILAMENTARY MATERIAL OF AN ACETONE-SOLUBLE COPOLYMER OF ACRYLONITRILE AND VINYLIDENE CHLORIDE CONTAINING 40 TO 48% OF ALRYLONITRILE BY EXTRUDING AN ACETONE SOLUTION OF THE COPOLYMER AND REMOVING ACETONE FROM THE EXTRUDED SOLUTION, STRETCHING THE MATERIAL BY 500 TO 1000% OF ITS LENGTH AT A TEMPERATURE OF 175* TO 195* C., SETTING THE STRETCHED MATERIAL BY HEATING IT AT CONSTANT LENGTH TO A TEMPERATURE OF 165* TO 190* C., AND THEN HEATING THE MATERIAL UNDER A TENSION INSUFFICIENT TO PREVENT SHRINKAGE TO A TEMPERATURE WHICH IS IN ALL CASES ABOVE 150* C. AND, SUBJECT TO THIS LIMITATION, IS BETWEEN A LEVEL 25* C. BELOW THE SETTING TEMPERATURE AND 195* C.
Claim 2
Dependent Claim
140 words
PROCESS FOR THE MANUFACTURE OF ARTIFICIAL TEXTILE MATERIALS OF A PURELY SYNTHETIC SUBSTANCE AND CHARACTERIZED BY HAVING A HIGH DEGREE OF DIMENSIONAL STABILITY AT TEMPERATURES ABOVE 150* C., WHICH COMPRISES FORMING FILAMENTARY MATERIAL OF AN ACETONE-SOLUBLE COPOLYMER OF ACRYLONITRILE AND VINYLIDENE CHLORIDE CONTAINING 40 TO 48% OF ALRYLONITRILE BY EXTRUDING AN ACETONE SOLUTION OF THE COPOLYMER AND REMOVING ACETONE FROM THE EXTRUDED SOLUTION, STRETCHING THE MATERIAL BY 500 TO 1000% OF ITS LENGTH AT A TEMPERATURE OF 175* TO 195* C., SETTING THE STRETCHED MATERIAL BY HEATING IT AT CONSTANT LENGTH TO A TEMPERATURE OF 165* TO 190* C., AND THEN HEATING THE MATERIAL UNDER A TENSION INSUFFICIENT TO PREVENT SHRINKAGE TO A TEMPERATURE WHICH IS IN ALL CASES ABOVE 150* C. AND, SUBJECT TO THIS LIMITATION, IS BETWEEN A LEVEL 25* C. BELOW THE SETTING TEMPERATURE AND 195* C.
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) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |