Patent US3025282A successfully refreshed from Google Patents.
US3025282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerization of vinyl ethers
Assignee: Hercules Powder Co
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Filing: 1959-09-14
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Granted: 1962-03-13
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Expires: 1979-09-14
Abstract
No abstract record available.
Inventors
- 👤 Donald L Christman
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:07
CPC Classifications
C; C08; C08F; C08F16/00; C08F16/12; Y; Y10; Y10S; Y10S264/00; Y10S264/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
THE PROCESS OF POLYMERIZING AN R ETHYLENICALLY UNSATURATED ETHER SELECTED FROM THE GROUP CONSISTIN OF (1) ETHERS IN WHICH ONE VALENCE OF THE ETHEREAL OXYGEN IS SATISIFIED BY A RADICAL SELECTED FROM THE GROUP CONSISTING OF VINYL, PROPENYL AND ISOPROPENYL RADICALS AND THE OTHER VALENCE OF THE ETHEREAL OXYGEN IS SATISFIED BY A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, ALKOXYALKYL, CYANOALKYL, FLUOROALKYL, CHLORALKYL, ALLYL, CYCLOALKYL, ARALKYL, AND ARYL RADICALS, AND (2) ALKYL BUTADIENTYL ETHERS WHICH COMPRISES CONTACTING AT LEAST ONE OF SAID ETHERS AT A TEMPERATURE FROM ABOUT -100* TO 200*C. WITH THE CATALYST FORMED BY MIXING A METAL COMPOUND, WITH SULFURIC ACID, SAID METAL COMPOUND HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
112 words
THE PROCESS OF POLYMERIZING AN R ETHYLENICALLY UNSATURATED ETHER SELECTED FROM THE GROUP CONSISTIN OF (1) ETHERS IN WHICH ONE VALENCE OF THE ETHEREAL OXYGEN IS SATISIFIED BY A RADICAL SELECTED FROM THE GROUP CONSISTING OF VINYL, PROPENYL AND ISOPROPENYL RADICALS AND THE OTHER VALENCE OF THE ETHEREAL OXYGEN IS SATISFIED BY A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, ALKOXYALKYL, CYANOALKYL, FLUOROALKYL, CHLORALKYL, ALLYL, CYCLOALKYL, ARALKYL, AND ARYL RADICALS, AND (2) ALKYL BUTADIENTYL ETHERS WHICH COMPRISES CONTACTING AT LEAST ONE OF SAID ETHERS AT A TEMPERATURE FROM ABOUT -100* TO 200*C. WITH THE CATALYST FORMED BY MIXING A METAL COMPOUND, WITH SULFURIC ACID, SAID METAL COMPOUND HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2827447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |