Patent US2431336A successfully refreshed from Google Patents.
US2431336A
Expired / Lapsed
US
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Dust collector
Assignee: Westinghouse Electric Corp
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Filing: 1945-06-16
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Granted: 1947-11-25
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Expires: 1965-06-16
Abstract
No abstract record available.
Inventors
- 👤 Roland L Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:31
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE325680C
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DE329240C
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US1032200A
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FR517788A
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US1603878A
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FR645477A
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US2269412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |