US2811551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long-chain unsaturated dicarboxylic acids and esters thereof
Assignee: EIDP Inc
•
Filing: 1953-01-14
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Granted: 1957-10-29
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Expires: 1973-01-14
Abstract
No abstract record available.
Inventors
- 👤 Coffman Donald Drake
- 👤 Cripps Harry Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:01
CPC Classifications
C; C07; C07C; C07C51/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
LONG-CHAIN UNSATURATED ALPHA,OMEGA-DICARBOXYLIC ACIDS AND ESTERS THEREOF, HAVING TWO NONCONJUGATED ETHYLENIC DOUBLE BONDS, OF THE FORMULA
Claim 2
Dependent Claim
16 words
LONG-CHAIN UNSATURATED ALPHA,OMEGA-DICARBOXYLIC ACIDS AND ESTERS THEREOF, HAVING TWO NONCONJUGATED ETHYLENIC DOUBLE BONDS, OF THE FORMULA
Claim 3
Dependent Claim
109 words
PROCESS OF PREPARING LONG-CHAIN DICARBONYL COMPOUNDS WHICH COMPRISES CONTACTING A POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,3-CONJUGATED DIENES AND MONOETHYLENICALLY UNSATURATED ALIPHATIC ESTERS WITH A KETONE PEROXIDE SELECTED FROM THE GROUP CONSISTING OF PEROXIDES OF CYCLIC KETONES, PEROXIDES OF KETOESTERS AND PEROXIDES OF ACYCLIC DIKETONES IN THE PRESENCE OF A REDOX REDUCING AGENT, IN A SOLVENT FOR THE REACTANTS, THE MOLAR RATIO OF SAID ETHYLENICALLY UNSATURATED COMPOUND TO SAID KETONE PEROXIDE BEING FROM SUBSTANTIALLY 1:1 UP TO 5:1 TO FORM A DICARBONYL COMPOUND CONSISTING OF A DIMER OF THE ETHYLENICALLY UNSATURATED COMPOUND COUPLED AT EACH END TO A CARBONYL TERMINAL UNIT FROM THE KETONE PEROXIDE.
Claim 4
Dependent Claim
109 words
PROCESS OF PREPARING LONG-CHAIN DICARBONYL COMPOUNDS WHICH COMPRISES CONTACTING A POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,3-CONJUGATED DIENES AND MONOETHYLENICALLY UNSATURATED ALIPHATIC ESTERS WITH A KETONE PEROXIDE SELECTED FROM THE GROUP CONSISTING OF PEROXIDES OF CYCLIC KETONES, PEROXIDES OF KETOESTERS AND PEROXIDES OF ACYCLIC DIKETONES IN THE PRESENCE OF A REDOX REDUCING AGENT, IN A SOLVENT FOR THE REACTANTS, THE MOLAR RATIO OF SAID ETHYLENICALLY UNSATURATED COMPOUND TO SAID KETONE PEROXIDE BEING FROM SUBSTANTIALLY 1:1 UP TO 5:1 TO FORM A DICARBONYL COMPOUND CONSISTING OF A DIMER OF THE ETHYLENICALLY UNSATURATED COMPOUND COUPLED AT EACH END TO A CARBONYL TERMINAL UNIT FROM THE KETONE PEROXIDE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |