Patent US3743677A successfully refreshed from Google Patents.
US3743677A
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Continuous manufacture of bis(aminocyclohexyl)-alkanes or bis(aminocyclohexyl)ethers
Assignee: BASF SE
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Filing: 1971-08-03
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Granted: 1973-07-03
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Expires: 1991-08-03
Abstract
Abstract CONTINUOUS PROCESS FOR THE HYDROGENERATION OF BIS(AMINOPHENYL) ALKANES TO BIS(AMINOCYCLOHEXYL) ALKANES USING SUSPENDED HYDROGENATION CATALYSTS, IN WHICH THE HEAT OF REACTION IS SUBSTANTIALLY REMOVED FROM THE REACTION VESSEL BY MEANS OF A RECYCLED LIQUID.
Inventors
- 👤 O Grosskinsky
- 👤 K Merkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:57
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68; C07C209/70; C07C209/72
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |