US3272866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for catalytic hydrogenation of adiponitrile
Assignee: Monsanto Co
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Filing: 1963-04-03
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Granted: 1966-09-13
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Expires: 1983-04-03
Abstract
No abstract record available.
Inventors
- 👤 John W Conner
- 👤 Phillip W Evans
- 👤 Jr Albert J Isacks
- 👤 Jr Chester P Neiswender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:39
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/44; C07C209/48; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J37/00; B01J37/34; B01J37/341; B01J37/342; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2666
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR CATALYTICALLY HYDROGENATING ADIPONITRILE TO PRODUCE HEXAMETHYLENEDIAMINE COMPRISING CONTACTING, AT A TEMPERATURE BETWEEN 25*C, AND 200*C. AND AT A PRESSURE BETWEEN 25 AND 10,000 POUNDS PER SQUARE INCH, A MIXTURE COMPRISING ADIPONITRILE, AMMONIA, AND HYDROGEN WITH A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT AND NICKEL PREPARED FROM A CORRESPONDING OXIDE, SAID OXIDE HAVING MAGNETIC PROPERTIES WHEN SUBJECTED TO A MAGNETIC FIELD OF INTENSITY BETWEEN 200 GAUSS AND 10,000 GAUSS.
Claim 2
Dependent Claim
74 words
A PROCESS FOR CATALYTICALLY HYDROGENATING ADIPONITRILE TO PRODUCE HEXAMETHYLENEDIAMINE COMPRISING CONTACTING, AT A TEMPERATURE BETWEEN 25*C, AND 200*C. AND AT A PRESSURE BETWEEN 25 AND 10,000 POUNDS PER SQUARE INCH, A MIXTURE COMPRISING ADIPONITRILE, AMMONIA, AND HYDROGEN WITH A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT AND NICKEL PREPARED FROM A CORRESPONDING OXIDE, SAID OXIDE HAVING MAGNETIC PROPERTIES WHEN SUBJECTED TO A MAGNETIC FIELD OF INTENSITY BETWEEN 200 GAUSS AND 10,000 GAUSS.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |