Patent US2468018A successfully refreshed from Google Patents.
US2854089A
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Electrostatic precipitator rapping system
Assignee: Research Corp
•
Filing: 1955-01-18
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Granted: 1958-09-30
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Expires: 1975-01-18
Abstract
No abstract record available.
Inventors
- 👤 Harry J White
- 👤 Herbert J Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:19
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/74; B03C3/76; B03C3/763; Y; Y10; Y10T; Y10T137/00; Y10T137/2713
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB216789A
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US1760461A
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US1762811A
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US1790147A
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US1912053A
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US2525872A
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US2508973A
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US2508134A
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US2550809A
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US2699224A
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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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |