US3154584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the catalytic reduction of dinitrotoluenes
Assignee: Imperial Chemical Industries Ltd
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Filing: 1960-12-23
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Granted: 1964-10-27
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Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Gardner Cyril
- 👤 New Randal George Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:33
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE PRODUCTION OF DIAMINOTOLUENE BY REDUCING DINITROTOLUENE WHICH COMPRISES GRADUALLY ADDING DINITROTOLUENE AND HYDROGEN TO A SUSPENSION OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF PALLADIUM AND PLATINUM IN A SOLUTION OF SAID DIAMINOTOLUENE IN A MIXTURE OF ATER AND AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, N-PROPANOL, ISOPROPANOL AND TERT-BUTANOL, AT A TEMPERATURE OF ABOUT 110 TO 140* C. AND A PRESSURE OF ABOUT 1 TO 10 ATMOSPHERES.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE PRODUCTION OF DIAMINOTOLUENE BY REDUCING DINITROTOLUENE WHICH COMPRISES GRADUALLY ADDING DINITROTOLUENE AND HYDROGEN TO A SUSPENSION OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF PALLADIUM AND PLATINUM IN A SOLUTION OF SAID DIAMINOTOLUENE IN A MIXTURE OF ATER AND AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, N-PROPANOL, ISOPROPANOL AND TERT-BUTANOL, AT A TEMPERATURE OF ABOUT 110 TO 140* C. AND A PRESSURE OF ABOUT 1 TO 10 ATMOSPHERES.
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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |