Patent US3555808A successfully refreshed from Google Patents.
US3555808A
Expired / Lapsed
US
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Process for drawing and continuously heat-setting synthetic filaments
Assignee: EIDP Inc
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Filing: 1968-10-09
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Granted: 1971-01-19
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Expires: 1988-10-09
Abstract
Abstract AN IMPROVED PROCESS FOR DRAWING AND CONTINOUSLY HEAT-SETTING FILAMENTS OF SYNTHETIC, MELT-SPINNABLE POLYMERS INVOLVES INCREASING THE COHERENCY OF THE FILAMENT BUNDLE DURING SUCH PROCESSING BY FALSE-TWISTING IN THE DRAWING ZONE.
Inventors
- 👤 Joseph D Gutmann Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:22
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; D01; D01D; D01D5/00; D01D5/12; D01D5/16; D01F; D01F1/00; D01F1/02; D01F6/00; D01F6/58; D01F6/60
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |