Patent US3493343A successfully refreshed from Google Patents.
Patent US2429265A successfully refreshed from Google Patents.
US2429265A
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US
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Apparatus for humidifying and cleaning gaseous fluids such as air
Assignee: Individual
•
Filing: 1944-08-16
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Granted: 1947-10-21
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Expires: 1964-08-16
Abstract
No abstract record available.
Inventors
- 👤 Walter L Fleisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; Y; Y10; Y10S; Y10S261/00; Y10S261/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1521578A
Cited
US1812548A
Cited
US1841536A
Cited
US1757690A
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US1870196A
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US1895597A
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US1976401A
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US2114787A
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US2099009A
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US2149593A
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US2137905A
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US2192126A
Cited
US2235322A
Cited
US2353936A
Cited
US2356757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |