Patent US3039253A successfully refreshed from Google Patents.
US3039253A
Expired / Lapsed
US
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Electrical precipitator power system
Assignee: Research Corp
•
Filing: 1956-05-02
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Granted: 1962-06-19
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Expires: 1976-05-02
Abstract
No abstract record available.
Inventors
- 👤 Harold E Van Hoesen
- 👤 Ralph E Willison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:21
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66; B03C3/68; Y; Y10; Y10S; Y10S323/00; Y10S323/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1405469A
Cited
US1834134A
Cited
DE644756C
Cited
DE670245C
Cited
US2310066A
Cited
GB705604A
Cited
US2907403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |