Patent US2591404A successfully refreshed from Google Patents.
US2591404A
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Electrostatic precipitator
Assignee: Westinghouse Electric Corp
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Filing: 1950-11-22
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Granted: 1952-04-01
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Expires: 1970-11-22
Abstract
No abstract record available.
Inventors
- 👤 Leonard H Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:05
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/74; B03C3/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |