Patent US3027398A successfully refreshed from Google Patents.
US3027398A
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Process for preparing dimethyl 1, 4-cyclohexanedicarboxylate
Assignee: EIDP Inc
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Filing: 1960-02-01
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Granted: 1962-03-27
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Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Foohey William Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:23
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/30; C07C67/303; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN THE PROCESS OF PREPARING DIMETHYL 1,4-CYCLOHEXANEDICARBOXYLATE BY THE CATALYTIC HYDROGENATION OF DIMETHYL TEREPHTHALATE, THE IMPROVEMENT WHERIN SAID DIMETHYL TEREPHTHALATE IS CATALYTICALLY HYDROGENATED IN MIXTURE WITH FROM ABOUT 25% TO 90* BY WEIGHT THEREOF OF SIMETHYL 1,4-CYCLOHEXANEDICARBOXYLATE AT A TEMPERATURE WITHIN THE RANGE OF 110*C, TO 140*C. AND UNDER A PRESSURE WITHIN THE RANGE OF ABOUT 500 P.S.I.G. TO ABOUT 1500 P.S.I.G.
Claim 2
Dependent Claim
62 words
IN THE PROCESS OF PREPARING DIMETHYL 1,4-CYCLOHEXANEDICARBOXYLATE BY THE CATALYTIC HYDROGENATION OF DIMETHYL TEREPHTHALATE, THE IMPROVEMENT WHERIN SAID DIMETHYL TEREPHTHALATE IS CATALYTICALLY HYDROGENATED IN MIXTURE WITH FROM ABOUT 25% TO 90* BY WEIGHT THEREOF OF SIMETHYL 1,4-CYCLOHEXANEDICARBOXYLATE AT A TEMPERATURE WITHIN THE RANGE OF 110*C, TO 140*C. AND UNDER A PRESSURE WITHIN THE RANGE OF ABOUT 500 P.S.I.G. TO ABOUT 1500 P.S.I.G.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |