US3274206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of pyridine aldehydes
Assignee: Nepera Chemical Co Inc
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Filing: 1964-03-06
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Granted: 1966-09-20
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Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 Wilbert Godfrey
- 👤 Scarano Louis
- 👤 Bernard F Duesel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:42
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/44; C07D213/46; C07D213/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD FOR THE PREPARATION OF PYRIDINE ALDEHYDES WHICH COMPRISES, SUBJECTING THE CORRESPONDING NITRILE MAINTAINED IN AN AQUEOUS ACID REACTION MEDIUM CONTAINING A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF PALLADIUM AND PLATINUM DIOXIDE, TO CONTROLLED HYDROGENATION BY THE ACTION OF AN APPROXIMATELY EQUAL MOLAR AMOUNT OF MOLECULAR HYDROGEN BASED ON THE QUANTITY OF SAID NITRILE, WHEREIN THE REACTION TEMPERATURE IS LESS THAN ABOUT 70*C.
Claim 2
Independent Claim
66 words
A METHOD FOR THE PREPARATION OF PYRIDINE ALDEHYDES WHICH COMPRISES, SUBJECTING THE CORRESPONDING NITRILE MAINTAINED IN AN AQUEOUS ACID REACTION MEDIUM CONTAINING A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF PALLADIUM AND PLATINUM DIOXIDE, TO CONTROLLED HYDROGENATION BY THE ACTION OF AN APPROXIMATELY EQUAL MOLAR AMOUNT OF MOLECULAR HYDROGEN BASED ON THE QUANTITY OF SAID NITRILE, WHEREIN THE REACTION TEMPERATURE IS LESS THAN ABOUT 70*C.
References Cited (Backward Citations)
DE1088958B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |