US2764597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of delta-cyclohexene 1, 2-dicarboxylic acid anhydride and esters
Assignee: EIDP Inc
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Filing: 1954-12-02
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Granted: 1956-09-25
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Expires: 1974-12-02
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Barney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:10
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/54; C07C51/567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
PROCESS FOR THE ISOMERIZATION OF A $4-CYCLOHEXENE1,2-DICARBOXYLIC ACID COMPOUND HAVING THE $4 UNSATURATION AS THE ONLY NON-AROMATIC CARBON-CARBON UNSATURATION AND HAVING AT MOST THREE OTHER SUBSTITUENTS ON THE CYCLOHEXENE RING AND THESE BEING HYDROCARBON RADICALS OF AT MOST SIX CARBON ATOMS ON CARBONS OF THE RING NUMBERED HIGHER THAN 2, CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN OF THE NAMED CARBOXYLS, AND SELECTED FROM THE CLASS CONSISTING OF THE SELF-ANHYDRIDES AND ALKYL ESTERS OF THE ACID, WHICH COMPRISES BRINGING SAID $4-CYCLOHEXENEDICARBOXYLIC ACID COMPOUND IN CONTACT, IN THE LIQUID PHASE AT A TEMPERATURE FROM ABOUT 100* C. TO ABOUT 225* C. WITH A CATALYTIC AMOUNT OF A CATALYST OF THE CLASS CONSISTING OF PALLADIUM AND RUTHENIUM.
Claim 2
Dependent Claim
114 words
PROCESS FOR THE ISOMERIZATION OF A $4-CYCLOHEXENE1,2-DICARBOXYLIC ACID COMPOUND HAVING THE $4 UNSATURATION AS THE ONLY NON-AROMATIC CARBON-CARBON UNSATURATION AND HAVING AT MOST THREE OTHER SUBSTITUENTS ON THE CYCLOHEXENE RING AND THESE BEING HYDROCARBON RADICALS OF AT MOST SIX CARBON ATOMS ON CARBONS OF THE RING NUMBERED HIGHER THAN 2, CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN OF THE NAMED CARBOXYLS, AND SELECTED FROM THE CLASS CONSISTING OF THE SELF-ANHYDRIDES AND ALKYL ESTERS OF THE ACID, WHICH COMPRISES BRINGING SAID $4-CYCLOHEXENEDICARBOXYLIC ACID COMPOUND IN CONTACT, IN THE LIQUID PHASE AT A TEMPERATURE FROM ABOUT 100* C. TO ABOUT 225* C. WITH A CATALYTIC AMOUNT OF A CATALYST OF THE CLASS CONSISTING OF PALLADIUM AND RUTHENIUM.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |