US2931459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control for dust collectors
Assignee: Pangborn Corp
•
Filing: 1955-12-27
•
Granted: 1960-04-05
•
Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 John H Wiles
- 👤 Charles A Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:26
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; B; B01; B01D; B01D47/00; B01D47/02; B01D47/024; B01D47/025; B01D47/027; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/8593; Y10T137/86236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US317734A
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US416048A
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US805653A
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US1346898A
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US1820981A
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US1877296A
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US2385161A
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US2399629A
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US2459635A
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US2585440A
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US2767806A
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US2763284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |