US2894802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming crimped artificial filaments
Assignee: Akzo Nobel UK PLC
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Filing: 1955-11-16
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Granted: 1959-07-14
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Expires: 1975-11-16
Abstract
No abstract record available.
Inventors
- 👤 Richard H Braunlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:34
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/22; D01D5/23
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
THE METHOD OF FORMING CRIMPED ARTIFICIAL FILAMENTS INCLUDING THE STEPS OF EXTRUDING A VISCOSE SOLUTION INTO AN AQUEOUS COAGULATING BATH TO FORM A TOW OF FILAMENTS, HEATING SPACED AREAS ALONG THE TOW LENGTH TO PRODUCE UNEVEN REGENERATION, AND PASSING THE TOW THROUGH AN AQUEOUS REGENERATING BATH TO COMPLETE REGENERATION THEREOF.
References Cited (Backward Citations)
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US2491937A
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US2417131A
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US2620258A
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US2582639A
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US2625461A
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US2774423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |