US2650675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the separation of particulate material from entraining gaseos fluids
Assignee: Bituminous Coal Research Inc
•
Filing: 1950-03-09
•
Granted: 1953-09-01
•
Expires: 1970-03-09
Abstract
No abstract record available.
Inventors
- 👤 John I Yellott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:53
CPC Classifications
B; B04; B04C; B04C3/00; B04C3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL52024C
Cited
US1478750A
Cited
US2005305A
Cited
US2252581A
Cited
US2368828A
Cited
US2370629A
Cited
US2542549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |