US2838558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic production of aromatic nitriles and imides
Assignee: Distillers Co Yeast Ltd
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Filing: 1956-09-20
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Granted: 1958-06-10
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Expires: 1976-09-20
Abstract
No abstract record available.
Inventors
- 👤 Hadley David James
- 👤 Wood Barrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:21
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE PROCESS WHICH COMPRISESS CONTACTING AT AN ELEVATED TEMPERATURE IN THE VAPOUR PHASE, A MIXTURE OF A LOWER ALKYL-SUBSTITUTED AROMATIC HYDROCARBON OF THE BENZENE AND NAPHTHALENE SERIES, AMMONIA AND MOLECULAR OXYGEN WITH A CATALYST COMPRISING VANADIUM OXIDE DEPOSITED ON ACTIVATED ALUMINA, THE LATTER HAVING BEEN HEATED PRIOR TO DEPOSITION TO A TEMPERATURE IN THE RANGE OF 1,000-1,500*C.
Claim 2
Dependent Claim
57 words
THE PROCESS WHICH COMPRISESS CONTACTING AT AN ELEVATED TEMPERATURE IN THE VAPOUR PHASE, A MIXTURE OF A LOWER ALKYL-SUBSTITUTED AROMATIC HYDROCARBON OF THE BENZENE AND NAPHTHALENE SERIES, AMMONIA AND MOLECULAR OXYGEN WITH A CATALYST COMPRISING VANADIUM OXIDE DEPOSITED ON ACTIVATED ALUMINA, THE LATTER HAVING BEEN HEATED PRIOR TO DEPOSITION TO A TEMPERATURE IN THE RANGE OF 1,000-1,500*C.
References Cited (Backward Citations)
US2450639A
Cited
US2499055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |