US2873000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic precipitator
Assignee: Individual
•
Filing: 1956-05-08
•
Granted: 1959-02-10
•
Expires: 1976-05-08
Abstract
No abstract record available.
Inventors
- 👤 Lowell S Elam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:53
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66; B03C3/86
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1992974A
Cited
US2129783A
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US2233639A
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US2336625A
Cited
US2585138A
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US2665770A
Cited
US2780305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |