US2994128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for assembling collecting cells for electrostatic precipitators
Assignee: Individual
•
Filing: 1956-09-07
•
Granted: 1961-08-01
•
Expires: 1976-09-07
Abstract
No abstract record available.
Inventors
- 👤 Gaylord W Penney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:18
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; B03C3/45; B03C3/47; B03C3/86; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49838; Y10T29/49895; Y10T29/49899; Y10T29/53; Y10T29/53696
Claims Analysis
Total Claims: 0
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US2282750A
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US2511730A
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US2754862A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |