US2642952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collecting plate assembly for electrostatic precipitators
Assignee: Trion Inc
•
Filing: 1950-02-04
•
Granted: 1953-06-23
•
Expires: 1970-02-04
Abstract
No abstract record available.
Inventors
- 👤 George F Landgraf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:12
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; B03C3/45; B03C3/51; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/4962; Y10T29/49826; Y10T29/49892; Y10T29/49908; Y10T29/49915; Y10T29/49922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US728118A
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US1042121A
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US1450961A
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US1516877A
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US1697316A
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US2392549A
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US2441208A
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US2470356A
Cited
US2476248A
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US2542262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |