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Patent US3211537A successfully refreshed from Google Patents.
US3211537A
Expired / Lapsed
US
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Fluid-solids contacting
Assignee: Phillips Petroleum Co
•
Filing: 1960-04-11
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Granted: 1965-10-12
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Expires: 1980-04-11
Abstract
No abstract record available.
Inventors
- 👤 John L Groebe
- 👤 John H Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:49
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01J; B01J8/00; B01J8/02; B01J8/0207; B01J8/0214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2363738A
Cited
US2779714A
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US2886517A
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US2853370A
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US2893852A
Cited
US2905633A
Cited
US2969318A
Cited
US2980515A
Cited
US2997374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |