US3410062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter
Assignee: Cambridge Filter Corp
•
Filing: 1966-09-12
•
Granted: 1968-11-12
•
Expires: 1986-09-12
Abstract
No abstract record available.
Inventors
- 👤 Charles G Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/0001; B01D46/10; B01D2265/00; B01D2265/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1297304A
Cited
FR795282A
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US2350996A
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US2494431A
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US2654440A
Cited
US2884091A
Cited
US2980208A
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US3112184A
Cited
US3025964A
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US3261474A
Cited
US3258900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |