US3445002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter unit with automatic cleaning and automatic discharge of collected impurities
Assignee: Individual
•
Filing: 1967-09-14
•
Granted: 1969-05-20
•
Expires: 1987-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jacques Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:24
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/44; B01D29/46; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D29/665; B01D29/668; B01D33/00; B01D33/01; B01D33/015; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0453; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3283903A
Cited
US3380591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |