US3472892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid bed process for synthesis of nitriles by ammoxidation and the recycling of ammonia-rich catalyst from a quench zone to a reaction zone
Assignee: Standard Oil Co
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Filing: 1967-05-10
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Granted: 1969-10-14
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Expires: 1987-05-10
Abstract
No abstract record available.
Inventors
- 👤 James L Callahan
- 👤 Ernest C Milberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J8/00; B01J8/005; B01J8/0055; B01J8/18; B01J8/24; B01J8/34; B01J8/38; B01J8/384; B01J8/386; B01J2208/00; B01J2208/00796; B01J2208/00823; B01J2208/00831; B01J2208/0084; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3280166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |