US3067152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous solution of polyvinyl alcohol containing insoluble starch derivative and proces of preparing fibers therefrom
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1960-05-26
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Granted: 1962-12-04
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Expires: 1980-05-26
Abstract
No abstract record available.
Inventors
- 👤 Fukushima Osamu
- 👤 Matsubayashi Kanji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:00
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
A POLYVINYL ALCOHOL SPINNING SOLUTION EFFECTIVE TO PROVIDE FIBERS OF POLYVINYL ALCOHOL OF IMPROVED PROPERTIES FORMED BY ADDING TO AN AQUEOUS SOLUTION OF POLYVINYL ALCOHOL, WATER INSOLUBLE STARCH DERIVATIVES WITH A PARTICLE SIZE BELOW 30, AND MIXING AND DISPERSING SAID DERIVATIVES IN SAID SOLUTION, SAID DERIVATIVES CONTAINING 0.02% TO 3% BY WEIGHT OF BASIC NITROGEN AND BEING THE PRODUCTS RESULTING FROM REACTION OF STARCH WITH A MEMBER OF THE GROUP CONSISTING OF EPOXY COMPOUNDS CONTAINING BASIC NITROGEN AND OBTAINED BY THE REACTION OF EPICHLOROHYDRIN WITH SECONDARY AMINES SELECTED FROM THE GROUP CONSISTING OF ALKYL AMINES AND CYCLOALKYL AMINES, ETHYLENE-IMINE THE REACTION PRODUCT OF ETHYLENE-IMINE WITH MELAMINE, THE REACTION PRODUCT OF ETHYLENE-IMINE WITH PHOSPHORIC ACID, AND B-AMINO EHTYL SULFURIC ACID.
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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |