US2678110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclone separator
Assignee: Individual
•
Filing: 1951-02-12
•
Granted: 1954-05-11
•
Expires: 1971-02-12
Abstract
No abstract record available.
Inventors
- 👤 Walter M Madsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US389786A
Cited
US1029214A
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US853517A
Cited
US1276016A
Cited
US1536592A
Cited
US1721908A
Cited
US2155911A
Cited
US2331786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |