Patent US3386981A successfully refreshed from Google Patents.
US3386981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of mixing a relatively viscous liquid with a relatively non-viscous liquid
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1964-09-25
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Granted: 1968-06-04
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 Akaboshi Michijiro
- 👤 Kominam Tsuguo
- 👤 Fukuda Seigo
- 👤 Uragami Kikuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:25
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
THE METHOD OF MIXING A RELATIVELY VISCOUS ALCOHOL SOLUTION OF POLYVINYL ACETATE WITH A RELATIVELY NON-VISCOUS SOLUTION OF AQUEOUS SODIUM HYDROXIDE WHICH COMPRISES FORMING AN ALCOHOL SOLUTION OF POLYVINYL ACETATE INTO A CONTINUOUSLY DOWNWARDLY FLOWING CYLINDRICAL FILM, FORMING THE AQUEOUS SODIUM HYDROXIDE SOLUTION INTO A FINE SPRAY INTERIORLY OF SAID CONTINUOUSLY FLOWING CYLINDRICAL FILM, AND CONTACTING THE INNER SURFACES OF SAID CONTINUOUSLY FLOWING FILM WITH SAID FINE SPRAY OF SAID AQUEOUS SODIUM HYDROXIDE SOLUTION.
Claim 2
Independent Claim
74 words
THE METHOD OF MIXING A RELATIVELY VISCOUS ALCOHOL SOLUTION OF POLYVINYL ACETATE WITH A RELATIVELY NON-VISCOUS SOLUTION OF AQUEOUS SODIUM HYDROXIDE WHICH COMPRISES FORMING AN ALCOHOL SOLUTION OF POLYVINYL ACETATE INTO A CONTINUOUSLY DOWNWARDLY FLOWING CYLINDRICAL FILM, FORMING THE AQUEOUS SODIUM HYDROXIDE SOLUTION INTO A FINE SPRAY INTERIORLY OF SAID CONTINUOUSLY FLOWING CYLINDRICAL FILM, AND CONTACTING THE INNER SURFACES OF SAID CONTINUOUSLY FLOWING FILM WITH SAID FINE SPRAY OF SAID AQUEOUS SODIUM HYDROXIDE SOLUTION.
Claim 3
Independent Claim
77 words
THE METHOD OF PRODUCING POLYVINYL ALCOHOL WHICH COMPRISES FORMING AN ALCOHOLIC POLYVINYL ESTER SOLUTION INTO A CONTINUOUSLY FLOWING CYLINDRICAL FILM FORMING A SOLUTION OF A BASIC CATALYST EFFECTIVE TO CATALYZE SAPONIFICATION OF SAID POLYVINYL ESTER INTO A FINE SPRAY, CONTACTING THE INNER SURFACES OF SAID CYLINDRICAL FILM WITH SAID FINE SPRAY THEREBY TO INITIATE SAPONIFICATION OF THE POLYVINYL ESTER SOLUTION, FORMING THE SAPONIFYING FILM INTO FINE, DISCRETE DROPLETS, AND SUBSEQUENTLY RECOVERING FINE, UNIFORM PARTICLES OF POLYVINYL ALCOHOL.
Claim 4
Independent Claim
77 words
THE METHOD OF PRODUCING POLYVINYL ALCOHOL WHICH COMPRISES FORMING AN ALCOHOLIC POLYVINYL ESTER SOLUTION INTO A CONTINUOUSLY FLOWING CYLINDRICAL FILM FORMING A SOLUTION OF A BASIC CATALYST EFFECTIVE TO CATALYZE SAPONIFICATION OF SAID POLYVINYL ESTER INTO A FINE SPRAY, CONTACTING THE INNER SURFACES OF SAID CYLINDRICAL FILM WITH SAID FINE SPRAY THEREBY TO INITIATE SAPONIFICATION OF THE POLYVINYL ESTER SOLUTION, FORMING THE SAPONIFYING FILM INTO FINE, DISCRETE DROPLETS, AND SUBSEQUENTLY RECOVERING FINE, UNIFORM PARTICLES OF POLYVINYL ALCOHOL.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |