Patent JPS59202011A successfully refreshed from Google Patents.
Patent US3852573A successfully refreshed from Google Patents.
Patent US2162019A successfully refreshed from Google Patents.
US2162019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust removing apparatus
Assignee: CARL F BERG
•
Filing: 1938-05-28
•
Granted: 1939-06-13
•
Expires: 1958-05-28
Abstract
No abstract record available.
Inventors
- 👤 Eric R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:21
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S29/00; Y10S29/084
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) | 1942-06-12 | 1942-12-12 | 1943-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-12 | 1946-12-12 | 1947-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-12 | 1950-12-12 | 1951-06-13 | $7700.00 | Window Closed / Lapsed |