Patent US3044974A successfully refreshed from Google Patents.
US3044974A
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Method of preparing polyvinyl alcohol filaments containing starch or derivatives thereof
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1959-05-20
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Granted: 1962-07-17
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Expires: 1979-05-20
Abstract
No abstract record available.
Inventors
- 👤 Tanabe Kenichi
- 👤 Suda Teruo
- 👤 Miyazaki Sadamaru
- 👤 Osugi Tetsuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:11
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/44; D01F6/50; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF PREPARING POLYVINYL ALCOHOL FILAMNENTS HAVING IMPROVED DYEING PROPERTIES WHICH COMPRISES FORMING AN AQUEOUS SPINNING SOLUTION CONTAINING POLYVINYL ALCOHOL, SAID POLYVINYL ALCOHOL CONSISTING OF AT LEAST ABOUT 98MOL PERCENT VINYL ALCOHOL, AND FROM 5 TO 70 PERCENT BASED ON THE WEIGHT OF POLYVINYL ALCOHOL OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF STARCH, AND WET SPINNING SOLUBLE MATERIALS DERIVED FROM STARCH, AND WET FILAMENTS, SAID SOLUTION INTO A COAGULATING LIQUID TO FORM FILAMENTS.
Claim 2
Independent Claim
76 words
THE METHOD OF PREPARING POLYVINYL ALCOHOL FILAMNENTS HAVING IMPROVED DYEING PROPERTIES WHICH COMPRISES FORMING AN AQUEOUS SPINNING SOLUTION CONTAINING POLYVINYL ALCOHOL, SAID POLYVINYL ALCOHOL CONSISTING OF AT LEAST ABOUT 98MOL PERCENT VINYL ALCOHOL, AND FROM 5 TO 70 PERCENT BASED ON THE WEIGHT OF POLYVINYL ALCOHOL OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF STARCH, AND WET SPINNING SOLUBLE MATERIALS DERIVED FROM STARCH, AND WET FILAMENTS, SAID SOLUTION INTO A COAGULATING LIQUID TO FORM FILAMENTS.
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) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |