US3079435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic hydrogenation of nitrophenol
Assignee: Abbott Laboratories
•
Filing: 1961-03-30
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Granted: 1963-02-26
•
Expires: 1981-03-30
Abstract
No abstract record available.
Inventors
- 👤 Freifelder Morris
- 👤 Ralph M Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:16
CPC Classifications
C; C07; C07C; C07C213/00; C07C213/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
THE METHOD OF HYDROGENATING NITROPHENOL COMPRISING THE STEPS OF MIXING NITROPHENOL, A CATALYST SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM, AND THE CORRESPONDING OXIDES, AT LEAST ONE MOLAR EQUIVALENT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF INERT, MINERAL ACIDS AND ACETIC ACID, AND WATER TO MAKE UP A REACTION MIXTURE CONTAINING AT LEASR 10% NITROPHENOL; AND HYDROGENATING SAID MIXTURE AT A PRESSURE BELOW 100 P.S.I. WITH GASEOUS HYDROGEN UNTIL 3 MOLES OF HYDROGEN ARE ABSORBED.
Claim 2
Independent Claim
78 words
THE METHOD OF HYDROGENATING NITROPHENOL COMPRISING THE STEPS OF MIXING NITROPHENOL, A CATALYST SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM, AND THE CORRESPONDING OXIDES, AT LEAST ONE MOLAR EQUIVALENT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF INERT, MINERAL ACIDS AND ACETIC ACID, AND WATER TO MAKE UP A REACTION MIXTURE CONTAINING AT LEASR 10% NITROPHENOL; AND HYDROGENATING SAID MIXTURE AT A PRESSURE BELOW 100 P.S.I. WITH GASEOUS HYDROGEN UNTIL 3 MOLES OF HYDROGEN ARE ABSORBED.
Claim 3
Independent Claim
86 words
THE METHOD OF PREPARING ACETYLAMINOPHENOL COMPRISING THE STEPS OF HYDROGENATING A MIXTURE COMPRISING NITROPHENOL, A CATALYST SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM, AND CORRESPONDING OXIDES, AT LEAST ONE MOLAR EQUIVALENT OF ACETIC ACID, AND WATER TO MAKE UP A REACTION MIXTURE CONTAINING AT LEAST 10% WEIGHT PER VOLUME OF NITROPHENOL WITH GASEOUS HYDROGEN AT A PRESSURE BELOW 100 P.S.I.G. UNTI; 3 MOLES OF HYDROGEN ARE ABSORBED; REMOVING SAID CATALYST BY FILTRATION; AND ADDING TO THE FILTRATE AT LEAST ONE MOLE EQUIVALENT OF ACETIC ANHYDRIDE.
Claim 4
Independent Claim
86 words
THE METHOD OF PREPARING ACETYLAMINOPHENOL COMPRISING THE STEPS OF HYDROGENATING A MIXTURE COMPRISING NITROPHENOL, A CATALYST SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM, AND CORRESPONDING OXIDES, AT LEAST ONE MOLAR EQUIVALENT OF ACETIC ACID, AND WATER TO MAKE UP A REACTION MIXTURE CONTAINING AT LEAST 10% WEIGHT PER VOLUME OF NITROPHENOL WITH GASEOUS HYDROGEN AT A PRESSURE BELOW 100 P.S.I.G. UNTI; 3 MOLES OF HYDROGEN ARE ABSORBED; REMOVING SAID CATALYST BY FILTRATION; AND ADDING TO THE FILTRATE AT LEAST ONE MOLE EQUIVALENT OF ACETIC ANHYDRIDE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |