US3564088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for flash spinning an integral web of polypropylene plexifilaments
Assignee: EIDP Inc
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Filing: 1969-09-03
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Granted: 1971-02-16
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Expires: 1989-09-03
Abstract
Abstract A WEB OF ENTANGLED PLEXIFILAMENTS OF ISOTACTIC POLY PROPYLENE IS OBTAINED BY FLASH SPINNING A SOLUTION OF THE POLYMER THROUGH TWO OR MORE CLOSELY-SPACED SPINNERET ORIFICES. DEPENDING UPON ARRANGEMENT OF THE ORIFICES, THE WEB MAY BE A YARN OR TOW OF SHAPED CROSS-SECTION, OR IT MAY BE A RIBBON OR SHEET PRODUCT. THE SOLVENT MAY BE 1,1,2-TRICHLORO - 1,2,2 - TRIFLUOROETHANE, TRICHLOROFLUOROMETHANE OR A MIXTURE THEREOF.
Inventors
- 👤 Rudolph Woodell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:40
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/04; D01D5/11
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |