US2604183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic precipitator
Assignee: Westinghouse Electric Corp
•
Filing: 1948-10-01
•
Granted: 1952-07-22
•
Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 Earl L Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:16
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; B03C3/45; B03C3/49
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE360119C
Cited
US2085735A
Cited
US1992974A
Cited
US1992113A
Cited
GB467823A
Cited
US2347709A
Cited
US2359149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |