US3546132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam-oxygen regeneration of silica-group iii-a-group iv-b catalysts
Assignee: Phillips Petroleum Co
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Filing: 1967-11-27
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Granted: 1970-12-08
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Expires: 1987-11-27
Abstract
No abstract record available.
Inventors
- 👤 James B Godin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:26
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; C; C08; C08F; C08F10/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
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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) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |