Patent US3772872A successfully refreshed from Google Patents.
US3772872A
Expired / Lapsed
US
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Polyester yarn for draw-texturing process
Assignee: EIDP Inc
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Filing: 1973-03-27
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Granted: 1973-11-20
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Expires: 1993-03-27
Abstract
Abstract Multifilament polyester feed yarn for false-twist texturing by combined draw-texturing processes wherein heat-setting temperatures are above 200*C. Filament breakage or fusion is substantially eliminated, and excellent crimp development is obtained, when the feed yarn has a break elongation of 70 to 180 percent, has a low interfilament boundary coefficient of friction, and the polyester is ethylene terephthalate polymer which is less than 30 percent crystalline.
Inventors
- 👤 M Piazza
- 👤 C Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:03
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10S; Y10S57/00; Y10S57/908
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
23 words
Feed yarn as defined in claim 1, of about 150 to 300 denier and having a boil-off shrinkage of 40 to 60 percent.
Claim 2
Dependent Claim
23 words
Feed yarn as defined in claim 1 and having an interfilament boundary coeffIcient of friction of 0.22 to 0.32 when measured as described.
Claim 3
Dependent Claim
23 words
Polyethylene terephthalate feed yarn as defined in claim 1 wherein the break elongation of the feed yarn is between 109 and 176 percent.
Claim 4
Dependent Claim
18 words
Feed yarn as defined in claim 1 and interlaced to a pint of about 20 to 40 inches.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |