Patent US2906594A successfully refreshed from Google Patents.
US2906594A
Expired / Lapsed
US
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Polyvinyl alcohol filaments of improved dye affinity and method of preparation
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1956-03-30
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Granted: 1959-09-29
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Expires: 1976-03-30
Abstract
No abstract record available.
Inventors
- 👤 Osugi Tetsuro
- 👤 Tanabe Kenichi
- 👤 Ohno Yasuji
- 👤 Suda Teruo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:35
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
36 words
A METHOD OF PREPARING FILAMENTS HAVING IMPROVED DYEING PROPERTIES AND RESISTANCE TO BOILING WATER, WHICH METHOD COMPRISES SPINNING AN AQUEOUS SOLUTION CONTAINING A POLYMER BLEND OF POLYVINYL ALCOHOL AND POLYVINYL AMINO-ACETAL WHICH CONSISTS OF VINYL ALCOHOL
Claim 2
Independent Claim
36 words
A METHOD OF PREPARING FILAMENTS HAVING IMPROVED DYEING PROPERTIES AND RESISTANCE TO BOILING WATER, WHICH METHOD COMPRISES SPINNING AN AQUEOUS SOLUTION CONTAINING A POLYMER BLEND OF POLYVINYL ALCOHOL AND POLYVINYL AMINO-ACETAL WHICH CONSISTS OF VINYL ALCOHOL
References Cited (Backward Citations)
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US2599494A
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US2716040A
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US2674025A
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US2739059A
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US2747998A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |