US2435201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet cleanout system for filters
Assignee: Butler Manufacturing Co
•
Filing: 1945-03-24
•
Granted: 1948-02-03
•
Expires: 1965-03-24
Abstract
No abstract record available.
Inventors
- 👤 Noel L Cooperider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:52
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D29/00; B01D29/39; B01D29/41; B01D29/62; B01D29/64; B01D29/6438
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US521040A
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US598296A
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GB189524887A
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US1139825A
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US1263226A
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US1385724A
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US1545091A
Cited
US1751613A
Cited
US1895083A
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US2013370A
Cited
US2044096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-02 | 1951-08-04 | 1952-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-02 | 1955-08-04 | 1956-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-02 | 1959-08-04 | 1960-02-03 | $7700.00 | Window Closed / Lapsed |