US3375641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter bag cleaning device
Assignee: Research Cottrell Inc
•
Filing: 1966-02-28
•
Granted: 1968-04-02
•
Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Armand L Labbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:05
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/66; B01D46/74; B01D46/76; B01D46/02; B01D46/04; B01D46/42; B01D46/4272; B01D46/44; B01D46/446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US393748A
Cited
US1622448A
Cited
US2368787A
Cited
US2576656A
Cited
US2836256A
Cited
FR1242091A
Cited
US2964129A
Cited
US3178868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |