US2950271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alcoholysis of polyvinyl acetate
Assignee: EIDP Inc
•
Filing: 1954-06-29
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Granted: 1960-08-23
•
Expires: 1974-06-29
Abstract
No abstract record available.
Inventors
- 👤 James M Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:29
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE PROCESS OF PRODUCING POLYVINLY ALCOHOL COMPRISING MIXING AN ALKALINE ALCOHOLYSIS CADTALYST AND A SOLUTION OF POLYVINYL ACETATE IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL TO PROVIDE A MIXTURE CONTAINING 30 TO 65% BY WEIGHT OF POLYVINYL ACETATE, AND HEATING THE MIXTURE AT A TEMPERATURE BETWEEN ABOUT 90* AND 150*C. TO EFFECT ALCOHOLYSIS OF SAID POLYVINYL ACETATE.
Claim 2
Dependent Claim
62 words
THE PROCESS OF PRODUCING POLYVINLY ALCOHOL COMPRISING MIXING AN ALKALINE ALCOHOLYSIS CADTALYST AND A SOLUTION OF POLYVINYL ACETATE IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL TO PROVIDE A MIXTURE CONTAINING 30 TO 65% BY WEIGHT OF POLYVINYL ACETATE, AND HEATING THE MIXTURE AT A TEMPERATURE BETWEEN ABOUT 90* AND 150*C. TO EFFECT ALCOHOLYSIS OF SAID POLYVINYL ACETATE.
References Cited (Backward Citations)
US2109883A
Cited
US2227997A
Cited
US2266996A
Cited
US2360308A
Cited
GB629695A
Cited
US2581832A
Cited
US2610360A
Cited
US2610359A
Cited
US2734048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |