US3084989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating polyvinyl alcohol
Assignee: Kurashiki Rayon Co Ltd
•
Filing: 1960-04-05
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Granted: 1963-04-09
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Expires: 1980-04-05
Abstract
No abstract record available.
Inventors
- 👤 Abe Hitoshi
- 👤 Ohno Yasuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:18
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/127; D01; D01F; D01F6/00; D01F6/02; D01F6/14; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR IMPROVING THE PROPERTIES OF SHAPED FORMS OF POLYVINYL ALCOHOL WHICH COMPRISES TREATING SUCH POLYVINYL ALCOHOL WITH AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC ALEHYDES CONSISTING OF CARBON, HYDROGEN AND OXYGEN ATOMS, AROMATIC ALDEHYDES CONSISTING OF CARBON, HYDROGEN AND OXYGEN ATOMS AND CHLOROSUBSTITUTED AROMATIC ALDEHYDES CONSISTING OF CARBON, HYDROGEN, OXYGEN AND CHLORINE ATOMS, SAID ALDEHYDE HAVING AT LEAST SEVEN CARBON ATOMS AND HAVING A WATER SOLUBILITY OF AT MOST 0.5% AT ROOM TEMPERATURE IN A SOLVENT SYSTEM CONTAINING AT LAST 10% BY WEIGHT OF WATER AND CONTAINING AT LEAST 10% BY WEIGHT OF PROPYL ALCOHOL.
Claim 2
Dependent Claim
99 words
A PROCESS FOR IMPROVING THE PROPERTIES OF SHAPED FORMS OF POLYVINYL ALCOHOL WHICH COMPRISES TREATING SUCH POLYVINYL ALCOHOL WITH AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC ALEHYDES CONSISTING OF CARBON, HYDROGEN AND OXYGEN ATOMS, AROMATIC ALDEHYDES CONSISTING OF CARBON, HYDROGEN AND OXYGEN ATOMS AND CHLOROSUBSTITUTED AROMATIC ALDEHYDES CONSISTING OF CARBON, HYDROGEN, OXYGEN AND CHLORINE ATOMS, SAID ALDEHYDE HAVING AT LEAST SEVEN CARBON ATOMS AND HAVING A WATER SOLUBILITY OF AT MOST 0.5% AT ROOM TEMPERATURE IN A SOLVENT SYSTEM CONTAINING AT LAST 10% BY WEIGHT OF WATER AND CONTAINING AT LEAST 10% BY WEIGHT OF PROPYL ALCOHOL.
References Cited (Backward Citations)
US2394689A
Cited
US2960384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-08 | 1966-10-08 | 1967-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-08 | 1970-10-08 | 1971-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-08 | 1974-10-08 | 1975-04-09 | $7700.00 | Window Closed / Lapsed |