US2827476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing alkene nitriles
Assignee: Stamicarbon BV
•
Filing: 1956-12-28
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Granted: 1958-03-18
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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 08:59
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS OF PREPARING ALKENE NITRILES COMPRISING DEHYDRATING THE CORRESPONDING LACTAMS IN THE PRESENCE OF AN EXCESS OF AMMONIA IN THE VAPOR PHASE AT A TEMPERATURE OF 250 TO 450*C. WITH THE AID OF BORON PHOSPHATE AS A DEHYDRATION CATALYST.
Claim 2
Dependent Claim
40 words
A PROCESS OF PREPARING ALKENE NITRILES COMPRISING DEHYDRATING THE CORRESPONDING LACTAMS IN THE PRESENCE OF AN EXCESS OF AMMONIA IN THE VAPOR PHASE AT A TEMPERATURE OF 250 TO 450*C. WITH THE AID OF BORON PHOSPHATE AS A DEHYDRATION CATALYST.
References Cited (Backward Citations)
US2234566A
Cited
US2404280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |