US2642152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal dust and cinder collector
Assignee: Individual
•
Filing: 1950-05-09
•
Granted: 1953-06-16
•
Expires: 1970-05-09
Abstract
No abstract record available.
Inventors
- 👤 Francis J Dohrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1101556A
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US1439412A
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US1445069A
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US1464113A
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US1563125A
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US1725100A
Cited
GB307334A
Cited
US2047568A
Cited
US2268442A
Cited
US2221385A
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US2491840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |