US3158458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-pleated air filter
Assignee: CONTINENTAL FILTER Corp A CORP OF OHIO
•
Filing: 1961-03-06
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Granted: 1964-11-24
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Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 John F Babbitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:45
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; B01D46/0002; B01D46/0005; B01D46/10; F; F24; F24F; F24F13/00; F24F13/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1049789A
Cited
US2080154A
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US2364573A
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GB750099A
Cited
US2907407A
Cited
US2907408A
Cited
GB847726A
Cited
US2943700A
Cited
US3138443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |