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US3137540A
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US
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Treatment of shaped polyvinyl alcohol bodies
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1960-04-05
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Granted: 1964-06-16
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Expires: 1980-04-05
Abstract
No abstract record available.
Inventors
- 👤 Osugi Tetsuro
- 👤 Matsumoto Masakazu
- 👤 Tanabe Kenichi
- 👤 Ohno Yasuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:17
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE METHOD OF IMPROVING THE PROPERTIES OF POLYVINYL ALCOHOL FIBERS ND FILMS WHICH COMPRISES ACETALIZING PREVIOUSLY-FORMED POLYVINYL ALCOHOL FIBERS AND FILMS WHICH SHRINK NOT MORE THAN 5% INLENGTH TO 80*C. WATER BY REACTION WITH AN AQUEOUS ACIDIFIED DISPERSION CONTAINING AT LEAST ONE SURFACE ACTIVE AGENT AND ABOUT 0.5 TO 15% BY WEIGHT OF A DISPERSED REACTANT SELECTED FROM THE GROUP CONSISTING OF BENZALDEHYDE AND ACETALS THEREOF FORMED WITH LOWER ALCOHOLS HAVING UP TO 3 CARBON ATOMS, THE TOTAL DEGGREE OF ACETALIZATION OF THE FIBERS AND FILMS NOT EXCEEDING 50% AND THE DEGREE OF ACETALIZATION WITH SAID REACTANT BEING AT LEAST 5%, SAID REACTANT BEING AT MOST SPARINGLY-SOLUBLE IN WATER.
Claim 2
Independent Claim
109 words
THE METHOD OF IMPROVING THE PROPERTIES OF POLYVINYL ALCOHOL FIBERS ND FILMS WHICH COMPRISES ACETALIZING PREVIOUSLY-FORMED POLYVINYL ALCOHOL FIBERS AND FILMS WHICH SHRINK NOT MORE THAN 5% INLENGTH TO 80*C. WATER BY REACTION WITH AN AQUEOUS ACIDIFIED DISPERSION CONTAINING AT LEAST ONE SURFACE ACTIVE AGENT AND ABOUT 0.5 TO 15% BY WEIGHT OF A DISPERSED REACTANT SELECTED FROM THE GROUP CONSISTING OF BENZALDEHYDE AND ACETALS THEREOF FORMED WITH LOWER ALCOHOLS HAVING UP TO 3 CARBON ATOMS, THE TOTAL DEGGREE OF ACETALIZATION OF THE FIBERS AND FILMS NOT EXCEEDING 50% AND THE DEGREE OF ACETALIZATION WITH SAID REACTANT BEING AT LEAST 5%, SAID REACTANT BEING AT MOST SPARINGLY-SOLUBLE IN WATER.
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |