US3012397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making high-bulk yarns
Assignee: Moulinage et Retorderie de Chavanoz SA
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Filing: 1959-11-30
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Granted: 1961-12-12
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Expires: 1979-11-30
Abstract
No abstract record available.
Inventors
- 👤 Servage Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:20
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE METHOD OF PRODUCING HIGH-CURL POLYACRYLONITRILE, ACRYLONITRILE CO-POLYMER, AND POLYESTER YARNS OF THE "HIGHBULK" TYPE, COMPRISING TWISTING IN A FIRST DIRECTION A FIRST YARN OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILES, ACRYLONITRILE CO-POLYMERS, AND POLYESTERS, SETTING OF SAID FIRST DIRECTIONAL TWIST AND UNTWISTING OF SAID YARN, TWISTING IN THE OPPOSITE DIRECTION TO SAID FIRST DIRECTION, A SECOND YARN SELECTED FROM SAID GROUP, SETTING OF SAID TWIST IN SAID SECOND YARN AND UNTWISTING OF SAID SECOND YARN, PERMITTING FILAMENT HEAT SHRINKING OF EACH OF SAID YARNS DURING SAID FIRST MENTIONED TWISTING THEREOF, OVERFEEDING AND MECHANICALLY SPATIALLY SHRINKING SAID YARNS BETWEEN APPROXIMATELY 5 TO 12% SUBSEQUENT TO SAID FIRST MENTIONED FILAMENT HEAT SHRINKAGE, COMBINING SAID YARNS TO FORM A COMBINED YARN, AND THEN SUBJECTING SAID COMBINED YARN TO A SUBSEQUENT HEAT TREATMENT WHILE UNDER SUBSTANTIALLY NO APPRECIABLE TENSION.
Claim 2
Independent Claim
138 words
THE METHOD OF PRODUCING HIGH-CURL POLYACRYLONITRILE, ACRYLONITRILE CO-POLYMER, AND POLYESTER YARNS OF THE "HIGHBULK" TYPE, COMPRISING TWISTING IN A FIRST DIRECTION A FIRST YARN OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILES, ACRYLONITRILE CO-POLYMERS, AND POLYESTERS, SETTING OF SAID FIRST DIRECTIONAL TWIST AND UNTWISTING OF SAID YARN, TWISTING IN THE OPPOSITE DIRECTION TO SAID FIRST DIRECTION, A SECOND YARN SELECTED FROM SAID GROUP, SETTING OF SAID TWIST IN SAID SECOND YARN AND UNTWISTING OF SAID SECOND YARN, PERMITTING FILAMENT HEAT SHRINKING OF EACH OF SAID YARNS DURING SAID FIRST MENTIONED TWISTING THEREOF, OVERFEEDING AND MECHANICALLY SPATIALLY SHRINKING SAID YARNS BETWEEN APPROXIMATELY 5 TO 12% SUBSEQUENT TO SAID FIRST MENTIONED FILAMENT HEAT SHRINKAGE, COMBINING SAID YARNS TO FORM A COMBINED YARN, AND THEN SUBJECTING SAID COMBINED YARN TO A SUBSEQUENT HEAT TREATMENT WHILE UNDER SUBSTANTIALLY NO APPRECIABLE TENSION.
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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |