US2911450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of dichlorobutenes
Assignee: EIDP Inc
•
Filing: 1957-12-13
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Granted: 1959-11-03
•
Expires: 1977-12-13
Abstract
No abstract record available.
Inventors
- 👤 Welton Donald Eldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:06
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/35; C07C17/358
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE PROCESS WHICH COMPRISES CONTACTING A MIXTURE OF 3,4-DICHLOROBUTENE-1, CIS-1,4-DICHLOROBUTENE-2, AND TRANS-184-DICHLOROBUTENE-2, WITH AQUEOUS CHLOROCUPROUS ACID CATALYST AT A TEMPERATURE FROM 25* C. TO 100* C. AND THEREAFTER SEPARATING FROM THE RESULTING MIXTURE THE ORGANIC PHASE COMPRISING TRANS-1,4-DICHLOROBUTENE-2 FORMED FROM SAID 3,4-DICHLOROBUTENE-1 AND FROM CIS -1,4DICHLOROBUTENE-2.
Claim 2
Dependent Claim
46 words
THE PROCESS WHICH COMPRISES CONTACTING A MIXTURE OF 3,4-DICHLOROBUTENE-1, CIS-1,4-DICHLOROBUTENE-2, AND TRANS-184-DICHLOROBUTENE-2, WITH AQUEOUS CHLOROCUPROUS ACID CATALYST AT A TEMPERATURE FROM 25* C. TO 100* C. AND THEREAFTER SEPARATING FROM THE RESULTING MIXTURE THE ORGANIC PHASE COMPRISING TRANS-1,4-DICHLOROBUTENE-2 FORMED FROM SAID 3,4-DICHLOROBUTENE-1 AND FROM CIS -1,4DICHLOROBUTENE-2.
References Cited (Backward Citations)
US2242084A
Cited
US2446475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |