US2532312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of dicyanobutene to adiponitrile
Assignee: EIDP Inc
•
Filing: 1948-07-07
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Granted: 1950-12-05
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Expires: 1968-07-07
Abstract
No abstract record available.
Inventors
- 👤 Llewellyn E Romilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:33
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS FOR PREPARING ADIPOITRILE WHICH COMPRISES CONTACTING A 1,4-DICYANOBUTENE IN THE LIQUID PHASE AT A TEMPERATURE OF FROM 25* TO 200* C. WITH AT LEAST 1 MOLE OF HYDROGEN PER MOLE OF 1,4-DICYANOBUTENE IN THE PRESENCE OF A PALLADIUM CATALYST.
Claim 2
Dependent Claim
41 words
A PROCESS FOR PREPARING ADIPOITRILE WHICH COMPRISES CONTACTING A 1,4-DICYANOBUTENE IN THE LIQUID PHASE AT A TEMPERATURE OF FROM 25* TO 200* C. WITH AT LEAST 1 MOLE OF HYDROGEN PER MOLE OF 1,4-DICYANOBUTENE IN THE PRESENCE OF A PALLADIUM CATALYST.
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) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |