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Patent US2579440A successfully refreshed from Google Patents.
US2579440A
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Electrostatic precipitator
Assignee: Westinghouse Electric Corp
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Filing: 1947-05-01
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Granted: 1951-12-18
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Expires: 1967-05-01
Abstract
No abstract record available.
Inventors
- 👤 Robert T Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:00
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/74; B03C3/02; B03C3/04; B03C3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR513836A
Cited
GB174995A
Cited
CH96319A
Cited
US1822074A
Cited
FR713691A
Cited
US2016991A
Cited
US1982639A
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 |