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Patent US2579445A successfully refreshed from Google Patents.
US2579445A
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Electrostatic precipitator
Assignee: Westinghouse Electric Corp
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Filing: 1949-01-28
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Granted: 1951-12-18
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Expires: 1969-01-28
Abstract
No abstract record available.
Inventors
- 👤 Ray W Warburton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:13
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US913941A
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US1598097A
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US2167395A
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US2199632A
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US2297601A
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US2408158A
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US2443780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |