Patent US2884458A successfully refreshed from Google Patents.
US2884458A
Expired / Lapsed
US
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Process for preparing parafluoroaniline
Assignee: Olin Corp
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Filing: 1957-03-15
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Granted: 1959-04-28
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Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Delmer A Fidler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:12
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36; C07C209/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD FOR THE MAUFACTURE OF PARA-FLUOROANILINE WHICH COMPRISES HYDROGENATING NITROBENZENE WITH MOLECULAR HYDROGEN AT A TEMPERATURE WITHIN THE RANGE FROM 0*C. TO 150*C. AND AT A PRESSURE WITHIN THE RANGE FROM 0 P.S.I.G. TO 1000 P.S.I.G. WHILE THE REACTION MIXTURE CONTAINS FROM 10 TO 50 MOLES OF HYDROGEN FLUORIDE PER MOLE OF NITROBENZENE AND ALSO CONTAINS A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF PLATINUM OXIDE, PALLADIUM OXIDE AND PALLADIUM METAL.
Claim 2
Independent Claim
73 words
A METHOD FOR THE MAUFACTURE OF PARA-FLUOROANILINE WHICH COMPRISES HYDROGENATING NITROBENZENE WITH MOLECULAR HYDROGEN AT A TEMPERATURE WITHIN THE RANGE FROM 0*C. TO 150*C. AND AT A PRESSURE WITHIN THE RANGE FROM 0 P.S.I.G. TO 1000 P.S.I.G. WHILE THE REACTION MIXTURE CONTAINS FROM 10 TO 50 MOLES OF HYDROGEN FLUORIDE PER MOLE OF NITROBENZENE AND ALSO CONTAINS A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF PLATINUM OXIDE, PALLADIUM OXIDE AND PALLADIUM METAL.
References Cited (Backward Citations)
US2683745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |