US3118928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile production
Assignee: EIDP Inc
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Filing: 1961-08-16
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Granted: 1964-01-21
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Expires: 1981-08-16
Abstract
No abstract record available.
Inventors
- 👤 Jr William E Garrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:28
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/30; C; C07; C07C; C07C253/00; C07C253/24; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE PREPARATION OF ACRYLONITRILE WHICH COMPRISES MIXING PROPANE, AMMONIA, AND OXYGEN IN THE PROPORTIONS OF FROM ABOUT 1 TO 7 VOLUMES OF PROPANE FOR EACH VOLUME OF AMMONIA AND FROM ABOUT 2 TO 8 VOLUMES OF OXYGEN FOR EACH VOLUME OF AMMONIA AND CONTACTING THE RESULTING MIXTURE WITH A CATALYST CONSISTING ESSENTIALLY OF COMBINED OXIDES OF TIN AND TUNGSTEN AT A TEMPERATURE OF ABOUT 500*C. TO 700*C. FOR ABOUT 0.5 TO 3 SECONDS.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE PREPARATION OF ACRYLONITRILE WHICH COMPRISES MIXING PROPANE, AMMONIA, AND OXYGEN IN THE PROPORTIONS OF FROM ABOUT 1 TO 7 VOLUMES OF PROPANE FOR EACH VOLUME OF AMMONIA AND FROM ABOUT 2 TO 8 VOLUMES OF OXYGEN FOR EACH VOLUME OF AMMONIA AND CONTACTING THE RESULTING MIXTURE WITH A CATALYST CONSISTING ESSENTIALLY OF COMBINED OXIDES OF TIN AND TUNGSTEN AT A TEMPERATURE OF ABOUT 500*C. TO 700*C. FOR ABOUT 0.5 TO 3 SECONDS.
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) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |