US2830072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of omega-amino alkane nitriles
Assignee: Stamicarbon BV
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Filing: 1956-12-28
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Granted: 1958-04-08
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Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 Johan W Garritsen
- 👤 Johannes H Ottenheym
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:20
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR THE PRODUCTION OF W-AMINO ALKANE NITRILES COMPRISING DEHYDRATING THE CORRESPONDING LACTANTS IN THE PRESENCE OF AN EXCESS OF AMMONIA IN THE VAPOR PHASE AT A TEMPERATURE OF 250-400*C. WITH THE AID OF A DEHYDRATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ACTIVATED ALUMINA AND KAOLIN.
Claim 2
Dependent Claim
48 words
A PROCESS FOR THE PRODUCTION OF W-AMINO ALKANE NITRILES COMPRISING DEHYDRATING THE CORRESPONDING LACTANTS IN THE PRESENCE OF AN EXCESS OF AMMONIA IN THE VAPOR PHASE AT A TEMPERATURE OF 250-400*C. WITH THE AID OF A DEHYDRATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ACTIVATED ALUMINA AND KAOLIN.
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |