Patent US2922085A successfully refreshed from Google Patents.
US2922085A
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US
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Electrical precipitator
Assignee: Beazer East Inc
•
Filing: 1958-09-05
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Granted: 1960-01-19
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Expires: 1978-09-05
Abstract
No abstract record available.
Inventors
- 👤 John W Drenning
- 👤 Howard T Williams
- 👤 Earle S Snader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:39
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/74; B03C3/76; B03C3/763
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2699224A
Cited
US2854089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |