US2542973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making crinkled fibers
Assignee: Dow Chemical Co
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Filing: 1948-09-18
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Granted: 1951-02-27
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Expires: 1968-09-18
Abstract
No abstract record available.
Inventors
- 👤 Nelson W Abernethy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/22; D01D5/08; D01D5/088; D01F; D01F6/00; D01F6/02; D01F6/08; D01F6/10; Y; Y10; Y10S; Y10S425/00; Y10S425/017
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD WHICH COMPRISES EXTRUDING FINE FILAMENTS OF A NORMALLY CRYSTALLINE SARAN DOWNWARDLY THROUGH AIR AND DIRECTING AGAINST ALL SIDES OF EACH SUCH FILAMENT A PLURALITY OF STREAMS OF AA GAS INERT TO THE FILAMENTS AT A LEVEL BETWEEN 1 AND 10 INCHES OUTSIDE THE EXTRUSION OFIRICE AND IN A MANNER SUCH AS NOT TO FORCE THE HOT FILAMENTS INTO COHERENCE WITH ONE ANOTHER, AND SUPERCOOLING AND STRETCHING THE FILAMENTS, TO OBTIAN A FILAMENTARY PRODUCT HAVING A NATURAL CRINKLE.
Claim 2
Independent Claim
79 words
THE METHOD WHICH COMPRISES EXTRUDING FINE FILAMENTS OF A NORMALLY CRYSTALLINE SARAN DOWNWARDLY THROUGH AIR AND DIRECTING AGAINST ALL SIDES OF EACH SUCH FILAMENT A PLURALITY OF STREAMS OF AA GAS INERT TO THE FILAMENTS AT A LEVEL BETWEEN 1 AND 10 INCHES OUTSIDE THE EXTRUSION OFIRICE AND IN A MANNER SUCH AS NOT TO FORCE THE HOT FILAMENTS INTO COHERENCE WITH ONE ANOTHER, AND SUPERCOOLING AND STRETCHING THE FILAMENTS, TO OBTIAN A FILAMENTARY PRODUCT HAVING A NATURAL CRINKLE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |