US3469371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the removal of particle accumulations from the electrodes of an electric precipitator
Assignee: BUELL ENG CO
•
Filing: 1967-05-02
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Granted: 1969-09-30
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Expires: 1987-05-02
Abstract
No abstract record available.
Inventors
- 👤 Peter C Gelfand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:20
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)
CA591169A
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US3312908A
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US3363402A
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US3360902A
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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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |