Patent US3770861A successfully refreshed from Google Patents.
US3770861A
Expired / Lapsed
US
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Super-drawing polyster filaments after application of a di-ester of apolyalkylene glycol
Assignee: Kuraray Co Ltd
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Filing: 1970-11-19
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Granted: 1973-11-06
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Expires: 1990-11-19
Abstract
Abstract R1-COO-AH, R1-COO-A-CO-R2, R1-O-AH, OR R1-O-A-CO-R2 WHEN A MELT-ADHESION PREVENTING AGENT SELECTED FROM COMPOUNDS EXPRESSED BY THE FLOLLOWING FORMULAS 1 TO 4 IS APPLIED TO SUBSTANTIALLY AMORPHOUS, MELT-SPUN, UNDRAWN SYNTHETIC LINEAR POLYESTER FILAMENTS IN AN AMOUNT OF AT LEAST 0.05% BY WEIGHT BASED ON THE WEIGHT OF THE FILAMENTS. AND THEN THE FILAMENTS ARE SUPER-DRAWN, MELTADHESION AMONG FILAMENTS, WHICH IS INEVITABLY CAUSED TO OCCUR IN CONVENTIONAL SUPER DRAWN METHODS, CAN BE COMPLETELY PREVENTED: D R A W I N G
Inventors
- 👤 Y Hirano
- 👤 T Yamane
- 👤 S Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:59
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/221; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D01F6/78; D01F6/84; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |