US3471024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Doucet SA
•
Filing: 1965-06-28
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Granted: 1969-10-07
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Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Charles Doucet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:50
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0039; B01D46/0041; B01D46/0042; B01D29/00; B01D29/11; B01D29/114; B01D29/115; B01D29/44; B01D29/48; B01D29/50; B01D29/52; B01D29/54; B01D29/62; B01D29/66; B01D29/68; B01D29/70; B01D29/72; B01D29/88; B01D29/90; B01D29/904; B01D35/00; B01D35/16; B01D36/00; B01D36/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |