US2828325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of benzonitrile
Assignee: Honeywell International Inc
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Filing: 1956-06-26
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Granted: 1958-03-25
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Expires: 1976-06-26
Abstract
No abstract record available.
Inventors
- 👤 George F Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:35
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF PREPARING BENZONITRILE WHICH COMPRISES PASSING A GASEOUS MIXTURE COMPRISING TOLUENE, AMMONIA AND OXYGEN, IN THE PROPORTION OF AT LEAST ABOUT 1.5 MOLS OF AMMONIA AND ABOUT 2.2 TO 6.0 MOLS OF OXYGEN FOR EVERY MOL OF TOLUENE, UPWARDLY THROUGH A FINELY DIVIDED VANADIUM OXIDE-CONTAINING CATALYST AT LINEAR VELOCITY SUFFICIENT TO EFFECT FLUIDIZATION OF THE CATALYST, AND MAINTAINING SAID GASEOUS MIXTURE IN CONTACT WITH THE CATALYST AT A TEMPERATURE OF ABOUT 300 TO 550*C.
Claim 2
Independent Claim
76 words
THE METHOD OF PREPARING BENZONITRILE WHICH COMPRISES PASSING A GASEOUS MIXTURE COMPRISING TOLUENE, AMMONIA AND OXYGEN, IN THE PROPORTION OF AT LEAST ABOUT 1.5 MOLS OF AMMONIA AND ABOUT 2.2 TO 6.0 MOLS OF OXYGEN FOR EVERY MOL OF TOLUENE, UPWARDLY THROUGH A FINELY DIVIDED VANADIUM OXIDE-CONTAINING CATALYST AT LINEAR VELOCITY SUFFICIENT TO EFFECT FLUIDIZATION OF THE CATALYST, AND MAINTAINING SAID GASEOUS MIXTURE IN CONTACT WITH THE CATALYST AT A TEMPERATURE OF ABOUT 300 TO 550*C.
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |