Patent US2568032A successfully refreshed from Google Patents.
US2568032A
Expired / Lapsed
US
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Dust collector
Assignee: CH Wheeler Manufacturing Co
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Filing: 1949-04-22
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Granted: 1951-09-18
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Expires: 1969-04-22
Abstract
No abstract record available.
Inventors
- 👤 Nicholas N Stephanoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:52
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1402784A
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US1344146A
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US2482362A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |