US3155632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing improved polyvinyl alcohol fibers
Assignee: Kurashiki Rayon Co Ltd
•
Filing: 1960-07-15
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Granted: 1964-11-03
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Expires: 1980-07-15
Abstract
No abstract record available.
Inventors
- 👤 Matsubayashi Kanji
- 👤 Fukushima Osamu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:15
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14; C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN THE MANUFACTURE OF POLYVINYL ALCOHOL FIBERS, THE STEPS WHICH COMPRISES PREPARING AN AQUEOUS SPINNING FLUID COMPRISING A MIXTURE OF A SOLUTION OF POLYVINYL ALCOHOL AND A POLYMER WHICH IS INSOLUBLE IN SAID SPINNING FLUID AND IS PRESENT IN SAID FLUID IN FINELY-DIVIDED FORM SAID POLYMER CONTAINING 0.2 TO 5% OF BASIC NITROGEN AND SAID POLYMER BEING FORMED FROM A POLYMER OF AN ETHYLENICALLY-UNSATURATED MONOMER CONTAINING A GROUP SELECTED FROM THE CLASS CONSISTING OF A HALOGEN, A CARBONYL GROUP AND AN ACID AMIDE GROUP, SAID LAST-NAMED POLYMER BEING IN FINELY-DIVIDED FORM IN AN AQUEOUS MEDIUM AND CONTAINING A GROUP SELECTED FROM THE CLASS CONSISTING OF A HALOGEN, A CARBONYL GROUP AND AN ACID AMIDE GROUP AND SAID BASIC NITROGEN BEING INTRODUCED BY CONVERTING SAID GROUP TO BASIC NITROGEN WHILE SAID LAST-NAMED POLYMER IS IN SAID FINELY-DIVIDED FORM, AND SPINNING SAID FLUID TO FORM FIBERS THEREFROM.
Claim 2
Dependent Claim
145 words
IN THE MANUFACTURE OF POLYVINYL ALCOHOL FIBERS, THE STEPS WHICH COMPRISES PREPARING AN AQUEOUS SPINNING FLUID COMPRISING A MIXTURE OF A SOLUTION OF POLYVINYL ALCOHOL AND A POLYMER WHICH IS INSOLUBLE IN SAID SPINNING FLUID AND IS PRESENT IN SAID FLUID IN FINELY-DIVIDED FORM SAID POLYMER CONTAINING 0.2 TO 5% OF BASIC NITROGEN AND SAID POLYMER BEING FORMED FROM A POLYMER OF AN ETHYLENICALLY-UNSATURATED MONOMER CONTAINING A GROUP SELECTED FROM THE CLASS CONSISTING OF A HALOGEN, A CARBONYL GROUP AND AN ACID AMIDE GROUP, SAID LAST-NAMED POLYMER BEING IN FINELY-DIVIDED FORM IN AN AQUEOUS MEDIUM AND CONTAINING A GROUP SELECTED FROM THE CLASS CONSISTING OF A HALOGEN, A CARBONYL GROUP AND AN ACID AMIDE GROUP AND SAID BASIC NITROGEN BEING INTRODUCED BY CONVERTING SAID GROUP TO BASIC NITROGEN WHILE SAID LAST-NAMED POLYMER IS IN SAID FINELY-DIVIDED FORM, AND SPINNING SAID FLUID TO FORM FIBERS THEREFROM.
References Cited (Backward Citations)
US2895786A
Cited
US2906594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |