US2653923A
Expired / Lapsed
US
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Method for preparation of a polyvinyl methyl ether
Assignee: GAF Chemicals Corp
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Filing: 1948-11-13
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Granted: 1953-09-29
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Expires: 1968-11-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Shekleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:48
CPC Classifications
C; C08; C08F; C08F16/00; C08F16/12; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1457; Y10T24/1459; Y10T24/1461; Y10T24/1463; Y10T24/1465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PRODUCING A SOMEWHAT RUBBERY FORM-STABLE, NON-STICKY, CURD-LKE POLYVINYL METHYL ETHER WHICH COMPRISES POLYMERIZING VINYL METHYL ETHER AT A TEMPERATURE FROM ABOUT -50* C. TO ABOUT -70* C. IN THE PRESENCE OF ABOUT 1%, BASED ON THE WEIGHT OF THE VINYL METHYL ETHER, OF A CATALYST THEREFOR AND UP TO 9 PARTS BY VOLUME OF DILUENT PER PART OF SAID CATALYST.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PRODUCING A SOMEWHAT RUBBERY FORM-STABLE, NON-STICKY, CURD-LKE POLYVINYL METHYL ETHER WHICH COMPRISES POLYMERIZING VINYL METHYL ETHER AT A TEMPERATURE FROM ABOUT -50* C. TO ABOUT -70* C. IN THE PRESENCE OF ABOUT 1%, BASED ON THE WEIGHT OF THE VINYL METHYL ETHER, OF A CATALYST THEREFOR AND UP TO 9 PARTS BY VOLUME OF DILUENT PER PART OF SAID CATALYST.
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) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |