Patent US3396514A successfully refreshed from Google Patents.
US3396514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaning system
Assignee: Babcock and Wilcox Co
•
Filing: 1966-11-07
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Granted: 1968-08-13
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Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Hurst
- 👤 Roy G Winklepleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:01
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; Y; Y10; Y10S; Y10S261/00; Y10S261/09; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB390144A
Cited
US2050797A
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US2056266A
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US2142406A
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US2180849A
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US2746564A
Cited
US2935375A
Cited
US3011966A
Cited
US3196930A
Cited
US3073092A
Cited
US3016981A
Cited
US3315443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |