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US2481439A
Expired / Lapsed
US
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Gas-solids contacting apparatus including means for stripping solid particles
Assignee: Standard Oil Development Co
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Filing: 1945-08-07
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Granted: 1949-09-06
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Expires: 1965-08-07
Abstract
No abstract record available.
Inventors
- 👤 Henry J Ogorzaly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:28
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1881; B01J38/00; B01J38/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934023A
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US2359310A
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US2394814A
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US2367694A
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US2389493A
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US2398228A
Cited
US2422262A
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US2415756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |