US2491645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for washing air
Assignee: DeVilbiss Co
•
Filing: 1944-11-23
•
Granted: 1949-12-20
•
Expires: 1964-11-23
Abstract
No abstract record available.
Inventors
- 👤 Albert R Clark
- 👤 James C Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:30
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10; B01D47/00; B01D47/02; B01D47/027; B05; B05B; B05B14/00; B05B14/40; B05B14/46; Y; Y10; Y10S; Y10S55/00; Y10S55/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1214114A
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US1842663A
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US2120490A
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US2119207A
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US2171574A
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US2167839A
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US2259626A
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US2373330A
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US2383138A
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US2395960A
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US2379795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |