US3486311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter bank assembly
Assignee: Flanders Filters Inc
•
Filing: 1967-12-22
•
Granted: 1969-12-30
•
Expires: 1987-12-22
Abstract
No abstract record available.
Inventors
- 👤 Adrian R Allan Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:23
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D46/00; B01D46/10; B01D46/12; Y; Y10; Y10S; Y10S52/00; Y10S52/08; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR42622E
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GB476310A
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US2291220A
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GB833307A
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US2963751A
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US3216183A
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US3277624A
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US3325954A
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US3321877A
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US3350862A
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US3415027A
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US3360910A
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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 |