Patent US1557762A successfully refreshed from Google Patents.
Patent US2620356A successfully refreshed from Google Patents.
US2620356A
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Production of aromatic amines
Assignee: Standard Oil Development Co
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Filing: 1943-07-17
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Granted: 1952-12-02
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Expires: 1963-07-17
Abstract
No abstract record available.
Inventors
- 👤 John C Munday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:01
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A CONTINUOUS METHOD FOR PRODUCING A PRIMARY AROMATIC AMINE FROM THE CORRESPONDING MONO-NITRO-MONO-CYCLIC AROMATIC COMPOUND BY HYDROGENATION IN THE PRESENCE OF AN ACTIVE HYDROGENATION CATALYST CONSISTING ESSENTIALLY OF A SULFIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN AT A REACTION TEMPERATURES BETWEEN 400*-600* F. IN A REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES INJECTING A COOL LIQUID STEAM OF THE NITRO AROMATIC COMPOUND ONTO THE CATALYST TO COOL THE CATALYST
Claim 2
Dependent Claim
75 words
IN A CONTINUOUS METHOD FOR PRODUCING A PRIMARY AROMATIC AMINE FROM THE CORRESPONDING MONO-NITRO-MONO-CYCLIC AROMATIC COMPOUND BY HYDROGENATION IN THE PRESENCE OF AN ACTIVE HYDROGENATION CATALYST CONSISTING ESSENTIALLY OF A SULFIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN AT A REACTION TEMPERATURES BETWEEN 400*-600* F. IN A REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES INJECTING A COOL LIQUID STEAM OF THE NITRO AROMATIC COMPOUND ONTO THE CATALYST TO COOL THE CATALYST
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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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |