US2605259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alcoholysis of polyvinyl esters
Assignee: Shawinigan Chemicals Ltd
•
Filing: 1950-03-03
•
Granted: 1952-07-29
•
Expires: 1970-03-03
Abstract
No abstract record available.
Inventors
- 👤 Leo M Germain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:04
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE ALKALINE ALCOHOLYSIS OF POLYVINYL ESTER COMPRISING THE REACTION, WITH METHANOL, OF A POLYVINYL ESTER OF AN UNSUBSTITUTED, SATURATED, ALIPHATIC MONOCARBOXYLIC ACID UNDER MILD MECHANICAL WORKING IN THE PRESENCE OF EXCES METHANOL, AN ALKALINE ALCOHOLYSIS CATALYST, AND A PETROLEUM DISTILLATE FRACTION WHOSE MAXIMUM BOILING POINT IS BELOW 200* C. IN AN AMOUNT SUFFICIENT TO CAUSE THE FORMATION OF A TWO PHASE SYSTEM DURING REACTION ALL OF THE POLYVINYL ESTER BEING IN SOLUTION IN THE METHANOL AT THE BEGINNING OF THE REACTION, THE PETROLEUM DISTILLATE FRACTION BEING THE DISPERSED PHASE AT THE BEGINNING OF THE REACTION AND INVERTING TO THE DISPERSING PHASE AS THE REACTION PROCEEDS.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE ALKALINE ALCOHOLYSIS OF POLYVINYL ESTER COMPRISING THE REACTION, WITH METHANOL, OF A POLYVINYL ESTER OF AN UNSUBSTITUTED, SATURATED, ALIPHATIC MONOCARBOXYLIC ACID UNDER MILD MECHANICAL WORKING IN THE PRESENCE OF EXCES METHANOL, AN ALKALINE ALCOHOLYSIS CATALYST, AND A PETROLEUM DISTILLATE FRACTION WHOSE MAXIMUM BOILING POINT IS BELOW 200* C. IN AN AMOUNT SUFFICIENT TO CAUSE THE FORMATION OF A TWO PHASE SYSTEM DURING REACTION ALL OF THE POLYVINYL ESTER BEING IN SOLUTION IN THE METHANOL AT THE BEGINNING OF THE REACTION, THE PETROLEUM DISTILLATE FRACTION BEING THE DISPERSED PHASE AT THE BEGINNING OF THE REACTION AND INVERTING TO THE DISPERSING PHASE AS THE REACTION PROCEEDS.
References Cited (Backward Citations)
US2502715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |