US2762450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple tube centrifugal dust collectors
Assignee: American Air Filter Co Inc
•
Filing: 1954-04-26
•
Granted: 1956-09-11
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Karl L Westlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 07:28
CPC Classifications
B; B04; B04C; B04C3/00; B04C3/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA470087A
Cited
GB580936A
Cited
US2490116A
Cited
US2515894A
Cited
GB628212A
Cited
US2533991A
Cited
GB674536A
Cited
US2662610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |