US2847082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic precipitators
Assignee: Westinghouse Electric Corp
•
Filing: 1955-11-03
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Granted: 1958-08-12
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Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 William J Roos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:57
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/155; B03C3/12; B03C3/34; B03C3/40; B03C3/41; B03C3/45; B03C3/47; B03C2201/00; B03C2201/04
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |