Patent US3386232A successfully refreshed from Google Patents.
US3386232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pocket-type filter
Assignee: American Air Filter Co Inc
•
Filing: 1965-04-22
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Granted: 1968-06-04
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Expires: 1985-04-22
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Gaines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:17
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH242136A
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US2731106A
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US2897971A
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US2980208A
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FR1222727A
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US3008542A
Cited
US3058594A
Cited
FR1275496A
Cited
US3273321A
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US3309848A
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US3276190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |