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Patent US3691748A successfully refreshed from Google Patents.
US3691748A
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Textured polyethylene terephthalate yarns
Assignee: Rhodiaceta SA
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Filing: 1970-09-23
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Granted: 1972-09-19
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Expires: 1990-09-23
Abstract
Abstract Textile articles comprise yarns of a synthetic thermoplastic material, especially polyethylene terephthalate, in which the individual filaments comprise alternating zones of increasing and decreasing thickness, the thinner zones having the higher crystallinity index and vica versa; the filaments have a nonspiral three-dimensional crimp, and both they, and the yarn comprising them, have a high apparent volume. The yarn is made by only partially stretching the initial yarn in contact with a crack promoting agent such as an aqueous alcohol, and subsequently giving the yarn, before or after it is made up, a heat treatment while it is in a relaxed state.
Inventors
- 👤 Michel Buzano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:34
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/229; D01; D01D; D01D5/00; D01D5/20; D02G; D02G1/00; D02J1/223; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2973; Y10T428/2976
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
23 words
Textile articles according to claim 1, in which the crystallinity index of the thinner parts of the filaments is between 20 and 50.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |