US3473666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throwaway filter construction
Assignee: Dana Inc
•
Filing: 1967-02-09
•
Granted: 1969-10-21
•
Expires: 1987-02-09
Abstract
No abstract record available.
Inventors
- 👤 Kingsley E Humbert Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:33
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/08; B01D27/10; B01D27/103; B01D2201/00; B01D2201/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2748949A
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US2877902A
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US3193101A
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US3023906A
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US3085688A
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US3224585A
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US3197029A
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DE1189520B
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US3268077A
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US3279609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |