Patent US3148166A successfully refreshed from Google Patents.
US3148166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl alcohol polymer films
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1962-01-03
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Granted: 1964-09-08
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Expires: 1982-01-03
Abstract
No abstract record available.
Inventors
- 👤 Suzumura Hideo
- 👤 Hirano Katsuaki
- 👤 Chiba Teiichiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/092; C08F; C08F8/00; C08F8/14; C08F8/34; C08F8/46; C08F8/48; C08F2810/00; C08F2810/30; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
215 words
A METHOD OF PRODUCING IMPROVED WATER-SOLUBLE FILMS FROM A NORMALLY READILY WATER-SOLUBLE POLYVINYL ALCOHOL DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF PARTIALLY SAPONIFIED POLYVINYL ACETATE, ACETALIZED POLYVINYL ALCOHOL, URETHANYLATED POLYVINYL ALCOHOL, OXYETHYLATED POLYVINYL ALCOHOL, AND CYANOETHYLATED POLYVINYL ALCOHOL WHICH COMPRISES, FORMING A FILM CONSISTING ESSENTIALLY OF AN ALIPHATIC DICARBOXYLIC ACID AND A NORMALLY READILY WATER-SOLUBLE POLYVINYL ALCOHOL DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF PARTIALLY SAPONIFIED POLYVINYL ACETATE, ACETALIZED POLYVINYL ALCOHOL, URETHANYLATED POLYVINYL ALCOHOL, OXYETHYLATED POLYVINYL ALCOHOL, AND CYANOETHYLATED POLYVINYL ALCOHOL, SAID ALIPHATIC DICARBOXYLIC ACID HAVING LESS THAN 3% SOLUBILITY IN WATER AT 20*C. BUT MORE THAN 0.3% SOLUBILITY IN WATER AT 100*C., SAID FORMED FILM CONTAINING FROM 0.5% TO 30% BY WEIGHT OF SAID ALIPHATIC DICARBOXCYLIC ACID BASED ON THE WEIGHT OF SAID POLYVINYL ALCOHOL DERIVATIVE IN SAID FORMED FILM, HEATING SAID FORMED FILM AT A TEMPERATURE OF 65*C. TO 105*C. WHEREBY FREE ALIPHATIC DICARBOXYLIC ACID SEPARATES OUT ON THE FILM SURFACE AND REMAINS ON SAID FILM SURFACE, SAID HEAT TREATED FILM, CONTAINING SAID FREE ACID ON SAID FILM SURFACE, HAVING THE SAME WATER-SOLUBILITY CHARACTERISTICS AS A FILM PREPARED SOLELY FROM SAID NORMALLY READILY WATER-SOLUBLE POLYVINYL ALCOHOL DERIVATIVE WHEREBY SAID FILM HAVING SAID FREE ACID ON SAID FILM SURFACE DISSOLVING TIMES AS SAID FILM MADE SOLELY FROM SAID NORMALLY READILY WATER-SOLUBLE POLYVINYL ALCOHOL DERIVATIVE.
Claim 2
Independent Claim
215 words
A METHOD OF PRODUCING IMPROVED WATER-SOLUBLE FILMS FROM A NORMALLY READILY WATER-SOLUBLE POLYVINYL ALCOHOL DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF PARTIALLY SAPONIFIED POLYVINYL ACETATE, ACETALIZED POLYVINYL ALCOHOL, URETHANYLATED POLYVINYL ALCOHOL, OXYETHYLATED POLYVINYL ALCOHOL, AND CYANOETHYLATED POLYVINYL ALCOHOL WHICH COMPRISES, FORMING A FILM CONSISTING ESSENTIALLY OF AN ALIPHATIC DICARBOXYLIC ACID AND A NORMALLY READILY WATER-SOLUBLE POLYVINYL ALCOHOL DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF PARTIALLY SAPONIFIED POLYVINYL ACETATE, ACETALIZED POLYVINYL ALCOHOL, URETHANYLATED POLYVINYL ALCOHOL, OXYETHYLATED POLYVINYL ALCOHOL, AND CYANOETHYLATED POLYVINYL ALCOHOL, SAID ALIPHATIC DICARBOXYLIC ACID HAVING LESS THAN 3% SOLUBILITY IN WATER AT 20*C. BUT MORE THAN 0.3% SOLUBILITY IN WATER AT 100*C., SAID FORMED FILM CONTAINING FROM 0.5% TO 30% BY WEIGHT OF SAID ALIPHATIC DICARBOXCYLIC ACID BASED ON THE WEIGHT OF SAID POLYVINYL ALCOHOL DERIVATIVE IN SAID FORMED FILM, HEATING SAID FORMED FILM AT A TEMPERATURE OF 65*C. TO 105*C. WHEREBY FREE ALIPHATIC DICARBOXYLIC ACID SEPARATES OUT ON THE FILM SURFACE AND REMAINS ON SAID FILM SURFACE, SAID HEAT TREATED FILM, CONTAINING SAID FREE ACID ON SAID FILM SURFACE, HAVING THE SAME WATER-SOLUBILITY CHARACTERISTICS AS A FILM PREPARED SOLELY FROM SAID NORMALLY READILY WATER-SOLUBLE POLYVINYL ALCOHOL DERIVATIVE WHEREBY SAID FILM HAVING SAID FREE ACID ON SAID FILM SURFACE DISSOLVING TIMES AS SAID FILM MADE SOLELY FROM SAID NORMALLY READILY WATER-SOLUBLE POLYVINYL ALCOHOL DERIVATIVE.
References Cited (Backward Citations)
US2169250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |