Patent US2685345A successfully refreshed from Google Patents.
Patent US3053028A successfully refreshed from Google Patents.
US3053028A
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Electrostatic filter
Assignee: McGraw Edison Co
•
Filing: 1957-12-02
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Granted: 1962-09-11
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Expires: 1977-12-02
Abstract
No abstract record available.
Inventors
- 👤 Charles J Kayko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:47
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/155; F; F24; F24F; F24F8/00; F24F8/10; F24F8/192; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2512407A
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US2591490A
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US2579441A
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US2612966A
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US2724457A
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US2786544A
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US2847082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |