US2525818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nitriles
Assignee: Phillips Petroleum Co
•
Filing: 1946-06-24
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Granted: 1950-10-17
•
Expires: 1966-06-24
Abstract
No abstract record available.
Inventors
- 👤 John E Mahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:38
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/68; C07C; C07C253/00; C07C255/00; C07C255/01; C07C255/02; C07C255/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR THE PRODUCTION OF NITRILES WHICH COMPRISES REACTING AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF SECONDARY AND TERTIARY ALDEHYDES WITH AMMONIA AT A TEMPERATURE WITHIN THE RANGE OF FROM 500 TO 850*F. IN THE PRESENCE OF A CATALYST COMPRISING A MINOR PROPORTION OF COPPER IN INITMATE ADMIXTURE WITH AN OXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND SILICON.
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE PRODUCTION OF NITRILES WHICH COMPRISES REACTING AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF SECONDARY AND TERTIARY ALDEHYDES WITH AMMONIA AT A TEMPERATURE WITHIN THE RANGE OF FROM 500 TO 850*F. IN THE PRESENCE OF A CATALYST COMPRISING A MINOR PROPORTION OF COPPER IN INITMATE ADMIXTURE WITH AN OXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND SILICON.
References Cited (Backward Citations)
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Cited
GB334193A
Cited
DE547518C
Cited
US2337421A
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US2418562A
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US2412437A
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US2443420A
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US2452187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |