US2934400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing fibers of polyethylene terephthalate
Assignee: Glanzstoff AG
•
Filing: 1956-03-19
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Granted: 1960-04-26
•
Expires: 1976-03-19
Abstract
No abstract record available.
Inventors
- 👤 Siggel Erhard
- 👤 Macura Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:55
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; D02G1/127; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D01G; D01G1/00; Y; Y10; Y10S; Y10S264/00; Y10S264/28; Y10S264/73; Y10S425/00; Y10S425/053; Y10S8/00; Y10S8/04; Y10S8/21
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
IN A PROCESS OF MANUFACTURING FIBERS OF POLYETHYLENE TEREPHTHALATE, THE IMPROVEMENT WHICH COMPRISES SPINNING AND THEN SOLIDIFYING MOLTEN POLYETHYLENE TEREPHTHALATE INTO A CONTINUOUS TOW OF FROM 200 FILAMENTS, 18000 DENIER, TO 200,000 FILAMENTS, 1,104,000 DENIER, APPLYING A UNIFORM COATING OF WATER TO THE TOW OF FROM 4 TO 10% BY WEIGHT OF DRY TOW PRIOR TO STRETCHING AND SUBSEQUENTLY STRETCHING THE SUBSTANTIALLY NON-ORIENTED FILAMENTS OF THE TOW HAVING SAID PRE-APPLIED COATING OF WATER IN THE PRESENCE OF STEAM FOR FIBER ORIENTATION.
References Cited (Backward Citations)
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US2395396A
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US2377810A
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US2394540A
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US2542973A
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US2733122A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |