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US2882030A
Expired / Lapsed
US
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Contacting column with spray-catching device
Assignee: Shell Development Co
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Filing: 1955-11-21
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Granted: 1959-04-14
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Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Zuiderweg Frederik Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:52
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1443974A
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US1748508A
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US2007759A
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GB618029A
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US2538957A
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US2573491A
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US2682394A
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US2725343A
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US2711308A
Cited
US2764535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |