Patent US2608576A successfully refreshed from Google Patents.
US2608576A
Expired / Lapsed
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Acrylonitrile synthesis
Assignee: Honeywell International Inc
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Filing: 1949-10-29
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Granted: 1952-08-26
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Expires: 1969-10-29
Abstract
No abstract record available.
Inventors
- 👤 Edward W Pietrusza
- 👤 John N Cosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:49
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/20; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR SYNTHESIS OF CARYLONITRILE WHICH COMPRISES INTRODUCING 3,3,3-NITROLOTRISPROPANAMIDE INTO A PYROLYSIS ZONE, PYROLYZING SAID TRISAMIDE IN VAPOR PHASE IN PRESENCE OF SILICA GEL CONTACT MATERIAL AT TEMPERATURES IN THE RANGE BETWEEN 350* C. AND ABOUT 700* C. WITH FORMATION OF ACRYLONITRILE, AND RECOVERING ACRYLONITRILE FROM THE 3,3,3-NITROLOTRISPROPANAMIDE PYROLYSIS PRODUCTS.
Claim 2
Dependent Claim
51 words
A PROCESS FOR SYNTHESIS OF CARYLONITRILE WHICH COMPRISES INTRODUCING 3,3,3-NITROLOTRISPROPANAMIDE INTO A PYROLYSIS ZONE, PYROLYZING SAID TRISAMIDE IN VAPOR PHASE IN PRESENCE OF SILICA GEL CONTACT MATERIAL AT TEMPERATURES IN THE RANGE BETWEEN 350* C. AND ABOUT 700* C. WITH FORMATION OF ACRYLONITRILE, AND RECOVERING ACRYLONITRILE FROM THE 3,3,3-NITROLOTRISPROPANAMIDE PYROLYSIS PRODUCTS.
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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |