Patent US3011861A successfully refreshed from Google Patents.
US3011861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet spinning polyvinyl alcohol process
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1959-03-26
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Granted: 1961-12-05
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Expires: 1979-03-26
Abstract
No abstract record available.
Inventors
- 👤 Tanabe Kenichi
- 👤 Osugi Tetsuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:36
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE METHOD OF PREPARING POLYVINYL ALCOHOL FIBERS HAVING A HOMOGENEOUS CROSS SECTION WHICH COMPRISES FORMING AN AQUEOUS SPINNING SOLUTION OF POLYVINYL ALCOHOL AND EXTRUDING THE SAID SPINNING SOLUTION INTO AN AQUEOUS COAGULATING BATH SIMULTANEOUSLY CONTAINING A WATER SOLUBLE THIOCYTANEOUSLY CONTAINING A PRESENCE OF SAID THIOCYANATE.
Claim 2
Independent Claim
45 words
THE METHOD OF PREPARING POLYVINYL ALCOHOL FIBERS HAVING A HOMOGENEOUS CROSS SECTION WHICH COMPRISES FORMING AN AQUEOUS SPINNING SOLUTION OF POLYVINYL ALCOHOL AND EXTRUDING THE SAID SPINNING SOLUTION INTO AN AQUEOUS COAGULATING BATH SIMULTANEOUSLY CONTAINING A WATER SOLUBLE THIOCYTANEOUSLY CONTAINING A PRESENCE OF SAID THIOCYANATE.
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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |