US3041377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of aromatic amines from nitro compounds
Assignee: Individual
•
Filing: 1958-11-17
•
Granted: 1962-06-26
•
Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Harast Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF CONVERTING AROMATIC NITRO COMPOUNDS TO AROMATIC AMINES WHICH COMPRISES: SUBJECTING VAPORS OF STEAM AND A COMPOUND SELECTED FROM THE CLASS CONSISTING OF NITROBENZENES AND NITRONAPHTHALENES TO THE ACTION OF FINELY DIVIDED CARBON, WHILE MAINTAINING THE COMPOUNDS IN THE VAPOR PHASE AND AT TEMPERATURES OF ABOUT 200-400*C. AT WHICH HYDROGEN IS GENERATED IN SITU, AND CONTINUING THE REACTION FOR SUFFICIENT TIME TO REDUCE THE NITRO COMPOUNDS TO AMINES BY THE GENERATED NASCENT HYDROGEN.
Claim 2
Independent Claim
75 words
THE METHOD OF CONVERTING AROMATIC NITRO COMPOUNDS TO AROMATIC AMINES WHICH COMPRISES: SUBJECTING VAPORS OF STEAM AND A COMPOUND SELECTED FROM THE CLASS CONSISTING OF NITROBENZENES AND NITRONAPHTHALENES TO THE ACTION OF FINELY DIVIDED CARBON, WHILE MAINTAINING THE COMPOUNDS IN THE VAPOR PHASE AND AT TEMPERATURES OF ABOUT 200-400*C. AT WHICH HYDROGEN IS GENERATED IN SITU, AND CONTINUING THE REACTION FOR SUFFICIENT TIME TO REDUCE THE NITRO COMPOUNDS TO AMINES BY THE GENERATED NASCENT HYDROGEN.
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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) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |