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US2464648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector
Assignee: Individual
•
Filing: 1947-02-03
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Granted: 1949-03-15
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Expires: 1967-02-03
Abstract
No abstract record available.
Inventors
- 👤 Frank N Niederkorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:10
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US451543A
Cited
US585568A
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US1628099A
Cited
DE627213C
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US2047568A
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US2193883A
Cited
US2228129A
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US2316016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |