Patent US3067253A successfully refreshed from Google Patents.
US3067253A
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Catalytic reduction of haloaromatic nitro compounds to haloaromatic amines
Assignee: Dow Chemical Co
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Filing: 1958-07-03
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Granted: 1962-12-04
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Expires: 1978-07-03
Abstract
No abstract record available.
Inventors
- 👤 Andrew J Dietzler
- 👤 Theodore R Keil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:39
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36; C07C209/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR PRODUCING AN AROMATIC PRIMARY HALOAMINE WHEREIN THE HALOGEN HAS AN ATOMATIC NUMBER BELOW 36 COMPRISING HYDROGENATING THE CORRESPONDING NITRO COMPOUND AT A TEMPERATURE OF ABOUT 20 TO 100*C. AND A HYDROGEN PRESSURE OF ABOUT 1 TO 30 ATMOSPHERES AND IN THE PRESENCE OF A CATALYTIC AMOUNT OF NICKEL AND A CATALYST PROMOTOR SELECTED FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESIUM HYDROXIDES, SODIUM AND CALCIUM CARBONATES AND SODIUM AND CALCIUM ACETATES.
Claim 2
Dependent Claim
74 words
A PROCESS FOR PRODUCING AN AROMATIC PRIMARY HALOAMINE WHEREIN THE HALOGEN HAS AN ATOMATIC NUMBER BELOW 36 COMPRISING HYDROGENATING THE CORRESPONDING NITRO COMPOUND AT A TEMPERATURE OF ABOUT 20 TO 100*C. AND A HYDROGEN PRESSURE OF ABOUT 1 TO 30 ATMOSPHERES AND IN THE PRESENCE OF A CATALYTIC AMOUNT OF NICKEL AND A CATALYST PROMOTOR SELECTED FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESIUM HYDROXIDES, SODIUM AND CALCIUM CARBONATES AND SODIUM AND CALCIUM ACETATES.
References Cited (Backward Citations)
US2105321A
Cited
US2164154A
Cited
US2183019A
Cited
US2131734A
Cited
US2458214A
Cited
US2464194A
Cited
US2464044A
Cited
US2823235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |