US3486310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag filter system
Assignee: Boliden AB
•
Filing: 1968-06-03
•
Granted: 1969-12-30
•
Expires: 1988-06-03
Abstract
No abstract record available.
Inventors
- 👤 Karl Folke Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:36
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4227; B01D46/66; B01D46/74; B01D46/76; B01D2273/00; B01D2273/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US832450A
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US1843639A
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US1912280A
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US2137254A
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US2167236A
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US2854091A
Cited
US2853153A
Cited
US3345806A
Cited
US3339347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |