US2809987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of acrylonitrile and ethylene
Assignee: Pure Oil Co
•
Filing: 1956-03-30
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Granted: 1957-10-15
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Expires: 1976-03-30
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Walter J Sandner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:48
CPC Classifications
C; C07; C07C; C07C253/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
THE METHOD OF PREPARING ACRYLONITRILE AND ETHYLENE COMPRISING SUBJECTING A MIXTURE OF ETHANE AND CYANOGEN TO A TEMPERATURE OF ABOUT 750-900*C. IN A REACTION ZONE, COOLING THE REACTION MIXTURE TO A TEMPERATURE SUFFICIENTLY LOW TO CONDENSE ACRYLONITRILE, RECOVERING ACRYLONITRILE FROM THE CONDENSATION PRODUCT AND RECOVERING ETHYLENE FROM THE REACTION GAS.
References Cited (Backward Citations)
US2642454A
Cited
US2745864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |