US3014958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of unsaturated esters
Assignee: EIDP Inc
•
Filing: 1960-01-15
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Granted: 1961-12-26
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Expires: 1980-01-15
Abstract
No abstract record available.
Inventors
- 👤 Koch Theodore Augur
- 👤 Robinson Ivan Maxweil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:29
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/30; C07C67/333; C07C67/343; C07C51/00; C07C51/347; C07C51/353
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A PROCESS FOR PRODUCING POLYMERIZABLE ESTERS OF ALPHA, BETA-ETHYLENICALLY UNSATURATED ACIDS BY REACTION BETWEEN FORMALDEHYDE AND AN ESTER OF THE FORMULA RCH2COOR'' WHEREIN R IS A MEMBER OF THE CLASS CONSISTING OF -H, -ALKYL, -ARYL, -ARALKYL, -CYCLOALKYL, -ALKENYL, AND -ALKYLARYL RADICALS, R'' BEING A MEMBER OF THE CLASS CONSISTING OF -ALKYL, ARYL, -ARALKYL, -CYCLOALKYL, -ALKENYL, AND -ALKYLARYL RADICALS AT 225* TO 450*C. IN THE PRESENCE OF A DEHYDRATION CATALYST, THE IMPROVEMENT WHICH COMPRISES INTRODUCING FORMALDEHYDE INTO A MIXTURE CONTAINING THE SAID REACTANT ESTER AND AT LEAST 7% BY WEIGHT OF THE SAID POLYMERIZABLE ESTER, THE MOL PROPORTION OF THE REACTANT ESTER TO FORMALDEHYDE BEING FROM 1.5:1 TO 20:1, SAID RATIO BEING FURTHER LIMITED IN THAT IT EXCEEDS 7:1 WHEN WATER IS PRESENT.
Claim 2
Dependent Claim
123 words
IN A PROCESS FOR PRODUCING POLYMERIZABLE ESTERS OF ALPHA, BETA-ETHYLENICALLY UNSATURATED ACIDS BY REACTION BETWEEN FORMALDEHYDE AND AN ESTER OF THE FORMULA RCH2COOR'' WHEREIN R IS A MEMBER OF THE CLASS CONSISTING OF -H, -ALKYL, -ARYL, -ARALKYL, -CYCLOALKYL, -ALKENYL, AND -ALKYLARYL RADICALS, R'' BEING A MEMBER OF THE CLASS CONSISTING OF -ALKYL, ARYL, -ARALKYL, -CYCLOALKYL, -ALKENYL, AND -ALKYLARYL RADICALS AT 225* TO 450*C. IN THE PRESENCE OF A DEHYDRATION CATALYST, THE IMPROVEMENT WHICH COMPRISES INTRODUCING FORMALDEHYDE INTO A MIXTURE CONTAINING THE SAID REACTANT ESTER AND AT LEAST 7% BY WEIGHT OF THE SAID POLYMERIZABLE ESTER, THE MOL PROPORTION OF THE REACTANT ESTER TO FORMALDEHYDE BEING FROM 1.5:1 TO 20:1, SAID RATIO BEING FURTHER LIMITED IN THAT IT EXCEEDS 7:1 WHEN WATER IS PRESENT.
References Cited (Backward Citations)
US2734074A
Cited
US2821543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |