US2697653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contacting tower for vapors and finely divided solids, including heat exchange means therefor
Assignee: Standard Oil Development Co
•
Filing: 1951-11-28
•
Granted: 1954-12-21
•
Expires: 1971-11-28
Abstract
No abstract record available.
Inventors
- 👤 Edward W S Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:15
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; B01J8/30; F; F28; F28D; F28D13/00; Y; Y10; Y10S; Y10S159/00; Y10S159/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1002578A
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US1878467A
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US2493526A
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US2419245A
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US2494337A
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US2436870A
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US2591343A
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US2635973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |