US2904579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing nitriles
Assignee: SNIA Viscosa SpA
•
Filing: 1956-03-16
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Granted: 1959-09-15
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Expires: 1976-03-16
Abstract
No abstract record available.
Inventors
- 👤 Muench Werner
- 👤 Ruoti Enzo
- 👤 Maderno Cesano
- 👤 Silvestri Giuliana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:43
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
THE METHOD OF PREPARING MONOCARBOCYCLIC ARYL NITRILES OF THE FORMULA RCN, WHERE R IS MONOCARBOCYCYLIC ARYL, COMPRISING PASSING VAPORS OF A MONOCARBOCYCLIC FORMYL AMINE OF THE FORMULA RNHCOH, WHEREIN R IS MONOCARBOCYCLIC ARYL, OVER A DEHYDRATION CATALYST UNDER VACUUM IN THE RANGE OF 20-40 MM, HG AT ELEVATED TEMPERATURE.
Claim 2
Independent Claim
49 words
THE METHOD OF PREPARING MONOCARBOCYCLIC ARYL NITRILES OF THE FORMULA RCN, WHERE R IS MONOCARBOCYCYLIC ARYL, COMPRISING PASSING VAPORS OF A MONOCARBOCYCLIC FORMYL AMINE OF THE FORMULA RNHCOH, WHEREIN R IS MONOCARBOCYCLIC ARYL, OVER A DEHYDRATION CATALYST UNDER VACUUM IN THE RANGE OF 20-40 MM, HG AT ELEVATED TEMPERATURE.
References Cited (Backward Citations)
DE482943C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |