Patent US2569857A successfully refreshed from Google Patents.
US2800976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector
Assignee: Individual
•
Filing: 1954-03-08
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Granted: 1957-07-30
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Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 Louis A Pellon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:12
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/66; B01D46/70; B01D46/71; B01D50/00; B01D50/20; F; F24; F24F; F24F13/00; F24F13/28; B01D2265/00; B01D2265/06; B01D2275/00; B01D2275/20; B01D2275/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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Cited
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Cited
US2369649A
Cited
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Cited
US2391534A
Cited
FR1058555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |