Patent US2474199A successfully refreshed from Google Patents.
US2474199A
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Method for contacting gases and moving particle form solids
Assignee: ExxonMobil Oil Corp
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Filing: 1944-11-09
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Granted: 1949-06-21
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Expires: 1964-11-09
Abstract
No abstract record available.
Inventors
- 👤 Charles H Lechthaler
- 👤 John W Payne
- 👤 Peter D Valas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:22
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/12; F26B17/122; B; B01; B01J; B01J8/00; B01J8/08; B01J8/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE336138C
Cited
US575468A
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US707323A
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US1151268A
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US1262842A
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US2409263A
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US2388735A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |