US3634512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of diaminodicyclohexylalkanes or ethers
Assignee: BASF SE
•
Filing: 1968-12-02
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Granted: 1972-01-11
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Expires: 1988-12-02
Abstract
Abstract PRODUCTION OF DIAMINODICYCLOHEXYLALKANES OR ETHERS BY HYDROGENATION OF DIAMINODIPHENYLALKANES OR ETHERS AT ELEVATED TEMPERATURE AND SUPERATOMSPHERIC PRESSURE IN THE PRESENCE OF A SUPPORTED CATALYST CONTAINING COBALT OR NICKEL WHICH HAS BEEN PREPARED BY TREATING THE CARRIER MATERIAL (AND/OR THE FINISHED CATALYST) WITH A BASIC REACTING ALKALI METAL OR ALKALINE EARTH METAL COMPOUND AND THEN WITH A BINDER, APPLYING FINELY DIVIDED COBALT OXIDE OR NICKEL OXIDE OR FINELY DIVIDED COMPOUNDS OF COBALT OR NICKEL WHICH CHANGE INTO THE OXIDES WHEN HEATED, AND THEN DRYING AND HEATING IT TO 500* TO 1100*C.
Inventors
- 👤 Guenter Poehler
- 👤 Ludwig Wolf
- 👤 Hubert Corr
- 👤 Kurt Pilch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:21
CPC Classifications
B; B01; B01J; B01J37/00; B01J23/00; B01J23/70; B01J37/0009; B01J37/02; B01J37/0201
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |