US2934166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-demisting apparatus with drained mat
Assignee: Shell USA Inc
•
Filing: 1957-05-06
•
Granted: 1960-04-26
•
Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Jacobus J Van Rossum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US154475A
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DE336828C
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US1996604A
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US1987630A
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US1960260A
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US2230453A
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US2384424A
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US2687184A
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US2781861A
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |