US3555818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic precipitator
Assignee: Individual
•
Filing: 1968-04-22
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Granted: 1971-01-19
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Expires: 1988-04-22
Abstract
Abstract A PRECIPITATOR FOR ELECTROSTATICALLY REMOVING DUST AND OTHER CONTAIMINANTS FROM AIR PASSING THROUGH IT. THE PRECIPITATOR COMPRISES A PAIR OF MECHANICAL FILTERS POSITIONED ON EITHER SIDE OF AN IONIZING GRID, AN ELECTRIC FIELD BEING ESTABLISHED BETWEEN THE GRID AND THE MECHANICAL FILTERS. THE GRID MAY BE IN THE NATURE OF A PLURALITY OF VERTICAL WIRES OR RODS TO WHICH SHORT HORIZONTAL POINTED ELEMENTS ARE FASTENED. THESE POINTED ELEMENTS IONIZE THE AIR TO CHARGE THE CONTAMINANTS PASSING THERETHROUGH, THE CHARGE ON THE CONTAMINANTS CAUSING THEM TO BE ATTRACTED TO THE MECHANICAL FILTERS. THE POTENTIAL BETWEEN THE SCREEN AND THE FILTERS IS S.C. WITH A LOW RIPPLE FACTOR.
Inventors
- 👤 Blaine H Vlier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:41
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; B03C3/41; B03C2201/00; B03C2201/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |