Patent US2449601A successfully refreshed from Google Patents.
US2449601A
Expired / Lapsed
US
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Apparatus for contacting solids and gasteous fluids
Assignee: Standard Oil Development Co
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Filing: 1944-09-16
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Granted: 1948-09-21
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Expires: 1964-09-16
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Gohr
- 👤 Homer Z Martin
- 👤 Charles W Tyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:46
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2304128A
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US2369523A
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US2367694A
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US2358888A
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US2391944A
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US2384932A
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US2398228A
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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) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |