US2606927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic reduction of dicarbo-cyclic diamines
Assignee: EIDP Inc
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Filing: 1946-10-21
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Granted: 1952-08-12
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Expires: 1966-10-21
Abstract
No abstract record available.
Inventors
- 👤 Archie E Barkdoll
- 👤 Gerald M Whitman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:09
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68; C07C209/70; C07C209/72; C07C209/44; C07C209/48; C07C211/00; C07C211/01; C07C211/16; C07C211/33; C07C211/34; C07C211/36; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR OBTAINING DIALICYCLI DIAMINES WHICH COMRPISES REACTING WITH HYDROGEN AT A TEMPERATURE BETWEEN 225* AND 300* C. UNDER A TOTAL PRESSURE OF AT LEAST 500 ATMOSPHERES IN THE PRESENCE OF ANHYDROUS AMMONIA AND A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ELEMENTAL NICKEL, ELEMENTAL COBALT, ELEMENTAL NICKEL ON AN INERT SUPPORT AND ELEMENTAL COBALT ON AN INERT SUPPORT, A DICARBOCYCLIC DIAMINE IN WHICH EACH CARBOCYCLIC NUCLEUS CONTAINS 6 CRBONS AND AT LEAST ONE CARBOCYCLIC NUCLEUS IS A BENZENE NUCLEUS, AND HAVING THE CARBOCYCLIC NECLEUS SEPARATED BY A SATURATED DIVALENT ACYCLIC HYDROCARBON RADICAL CONTAINING FROM 1 TO 10 CARBON ATOMS, SAID ANHYDROUS AMMONIA BEING PRESENT IN AMOUNT OF 2 TO 20 MOLES PER MOLE OF DIAMINE BEING HYDROGENATED.
Claim 2
Dependent Claim
120 words
A PROCESS FOR OBTAINING DIALICYCLI DIAMINES WHICH COMRPISES REACTING WITH HYDROGEN AT A TEMPERATURE BETWEEN 225* AND 300* C. UNDER A TOTAL PRESSURE OF AT LEAST 500 ATMOSPHERES IN THE PRESENCE OF ANHYDROUS AMMONIA AND A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ELEMENTAL NICKEL, ELEMENTAL COBALT, ELEMENTAL NICKEL ON AN INERT SUPPORT AND ELEMENTAL COBALT ON AN INERT SUPPORT, A DICARBOCYCLIC DIAMINE IN WHICH EACH CARBOCYCLIC NUCLEUS CONTAINS 6 CRBONS AND AT LEAST ONE CARBOCYCLIC NUCLEUS IS A BENZENE NUCLEUS, AND HAVING THE CARBOCYCLIC NECLEUS SEPARATED BY A SATURATED DIVALENT ACYCLIC HYDROCARBON RADICAL CONTAINING FROM 1 TO 10 CARBON ATOMS, SAID ANHYDROUS AMMONIA BEING PRESENT IN AMOUNT OF 2 TO 20 MOLES PER MOLE OF DIAMINE BEING HYDROGENATED.
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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |