US3033541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-liquid contacting
Assignee: Standard Oil Co
•
Filing: 1957-09-19
•
Granted: 1962-05-08
•
Expires: 1977-09-19
Abstract
No abstract record available.
Inventors
- 👤 Harold M Belkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:29
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; 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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US542626A
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US1378716A
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US1694370A
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FR701314A
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US2944966A
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US2900799A
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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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |