US2823235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of nitro compounds to amines and catalyst therefor
Assignee: EIDP Inc
•
Filing: 1955-05-10
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Granted: 1958-02-11
•
Expires: 1975-05-10
Abstract
No abstract record available.
Inventors
- 👤 Graham Donald Penrose
- 👤 Spiegler Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:39
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
A HYDROGENATION CATALYST COMPRISING AN OLEOPHILLIC CARBON BLACK SUPPORT HAVING AN OIL ABSORPTION FACTOR OF AT LEAST ABOUT 200, SAID CARBON BLACK HAVING A SURFACE AREA WITHIN THE RANGE OF 20 TO 100 M.2/G., AND A NOBLE METAL TAKEN FROM THE GROUP CONSISTING OF PALLADIUM AND PLATINUM DEPOSITED ON ITS SURFACE AT A LOADING WITHIN THE RANGE OF ABOUT 0.1 TO 10% BY WEIGHT OF SAID SUPPORT.
Claim 2
Dependent Claim
67 words
A HYDROGENATION CATALYST COMPRISING AN OLEOPHILLIC CARBON BLACK SUPPORT HAVING AN OIL ABSORPTION FACTOR OF AT LEAST ABOUT 200, SAID CARBON BLACK HAVING A SURFACE AREA WITHIN THE RANGE OF 20 TO 100 M.2/G., AND A NOBLE METAL TAKEN FROM THE GROUP CONSISTING OF PALLADIUM AND PLATINUM DEPOSITED ON ITS SURFACE AT A LOADING WITHIN THE RANGE OF ABOUT 0.1 TO 10% BY WEIGHT OF SAID SUPPORT.
Claim 3
Dependent Claim
71 words
A PROCESS FOR THE REDUCTION OF ORGANIC NITRO COMPOUNDS WHEREIN AN ORGANIC NITRO COMPOUND IS MIXED WITH A NOBLE METAL CATALYST TAKEN FROM THE GROUP CONSISTING OF PALLADIUM AND PLATINUM DEPOSITED ON AN OLEOPHILIC CARBON BLACK SUPPORT AT A LOADING WITHIN THE RANGE OF ABOUT 0.1 TO 10% BY WEIGHT OF SAID SUPPORT WHICH HAS AN OIL ABSORPTION FACTOR OF AT LEAST ABOUT 200, THE RESULTING MIXTURE BEING REDUCED WITH HYDROGEN.
Claim 4
Dependent Claim
71 words
A PROCESS FOR THE REDUCTION OF ORGANIC NITRO COMPOUNDS WHEREIN AN ORGANIC NITRO COMPOUND IS MIXED WITH A NOBLE METAL CATALYST TAKEN FROM THE GROUP CONSISTING OF PALLADIUM AND PLATINUM DEPOSITED ON AN OLEOPHILIC CARBON BLACK SUPPORT AT A LOADING WITHIN THE RANGE OF ABOUT 0.1 TO 10% BY WEIGHT OF SAID SUPPORT WHICH HAS AN OIL ABSORPTION FACTOR OF AT LEAST ABOUT 200, THE RESULTING MIXTURE BEING REDUCED WITH HYDROGEN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |