US1868876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector
Assignee: W W SLY Manufacturing Co
•
Filing: 1931-02-21
•
Granted: 1932-07-26
•
Expires: 1951-02-21
Abstract
No abstract record available.
Inventors
- 👤 George A Boesger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:37
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/0002; B01D46/0005; B01D46/0009; B01D46/66; B01D46/74; B01D46/76; B01D2271/00; B01D2271/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-07-26 | 1936-01-25 | 1936-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-07-26 | 1940-01-25 | 1940-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-07-26 | 1944-01-25 | 1944-07-26 | $7700.00 | Window Closed / Lapsed |