US2833527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid and gas contacting columns and their tray structures
Assignee: Fluor Corp
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Filing: 1955-06-06
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Granted: 1958-05-06
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Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Kohl
- 👤 Wolfe Richard S De
- 👤 Robert L Solnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:43
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22; B01D3/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49369; Y10T29/49371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US710974A
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US1723659A
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US2292350A
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FR885548A
Cited
US2458629A
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US2514469A
Cited
GB630884A
Cited
US2690002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |