Patent US3671381A successfully refreshed from Google Patents.
US3671381A
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Etched and ridged polyamide monofilament
Assignee: EIDP Inc
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Filing: 1970-09-02
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Granted: 1972-06-20
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Expires: 1990-09-02
Abstract
Abstract POLYAMIDE MONOFILAMENT WITH A SURFACE WHICH IS IRREGULARLY RIDGED IN A DIRECTION PREDOMINANTLY TRANSVERSE TO THE LENGTH OF THE FILAMENT, AS WELL AS ETCHED. A METHOD FOR PRODUCTION THEREOF COMPRISING PASSING FILAMENT THROUGH A TUBE UNDER 100-150 P.S.I.G. OF STEAM FOR 0.1-10 SECONDS. SUCH FILAMENTS ARE USEFUL IN BRUSHES AND TEXTILES.
Inventors
- 👤 John Edward Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:40
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/07; D06M11/11; D06M11/13; C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08K; C08K3/00; C08K3/16; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0481; D01F; D01F6/00; D01F6/58; D01F6/60; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2978; Y10T428/298
Claims Analysis
Total Claims: 0
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |