US3565940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing acetonitrile
Assignee: WR Grace and Co
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Filing: 1969-02-20
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Granted: 1971-02-23
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Expires: 1989-02-20
Abstract
Abstract A METHOD OF PREPARING ACETONITRILE BY THE CATALYTIC AMMONIATION OF ETHYLENE AND/OR PROPYLENE BY PASSING A MIXTURE OF ETHYLENE AND/OR PROPYLENE AND AMMONIA THROUGH A BED OF A CATALYST AT A TEMPERATURE OF ABOUT 300-600*C. WHEREIN THE CATALYST IS A NITRIDE OF TUNGSTEN OR IRON.
Inventors
- 👤 Patrick Michael Brown
- 👤 James Michael Maselli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:19
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/18; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |