US2782220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation of di-alkyl succinates
Assignee: Imperial Chemical Industries Ltd
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Filing: 1954-03-29
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Granted: 1957-02-19
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Expires: 1974-03-29
Abstract
No abstract record available.
Inventors
- 👤 Ingram Donald William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:48
CPC Classifications
C; C07; C07F; C07F1/00; Y; Y10; Y10T; Y10T403/00; Y10T403/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR THE PRODUCTION OF AN ALCOHOL COMPLEX OF A DIALKALI METAL DERIVATIVE OF A LOWER DIALKYL CYCLOHEXA - 1,4 - DIENE - 2,5 - DIOL - 1,4 - DICARBOXYLATE, WHICH COMPRISES REACTING A LOWER DIALKYL SUCCINATE WITH AN ALKALI METAL ALKOXIDE IN THE PRESENCE OF AN ORGANIC DILUENT WHICH IS LIQUID UNDER REACTION CONDITIONS AND HAS A BOILING POINT ABOVE THAT OF ANY ALCOHOL FORMED IN THE REACTION, SAID DILUENT BEING SELECTED FROM THE GROUP CONSISTING OF EXCESS SUCCINATE AND PARAFFINIC, AROMATIC AND CYCLIC HYDRICARBONS.
Claim 2
Dependent Claim
87 words
A PROCESS FOR THE PRODUCTION OF AN ALCOHOL COMPLEX OF A DIALKALI METAL DERIVATIVE OF A LOWER DIALKYL CYCLOHEXA - 1,4 - DIENE - 2,5 - DIOL - 1,4 - DICARBOXYLATE, WHICH COMPRISES REACTING A LOWER DIALKYL SUCCINATE WITH AN ALKALI METAL ALKOXIDE IN THE PRESENCE OF AN ORGANIC DILUENT WHICH IS LIQUID UNDER REACTION CONDITIONS AND HAS A BOILING POINT ABOVE THAT OF ANY ALCOHOL FORMED IN THE REACTION, SAID DILUENT BEING SELECTED FROM THE GROUP CONSISTING OF EXCESS SUCCINATE AND PARAFFINIC, AROMATIC AND CYCLIC HYDRICARBONS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |