US3375640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter apparatus
Assignee: Crs Industries Inc
•
Filing: 1966-06-13
•
Granted: 1968-04-02
•
Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Michael H Pelosi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:40
CPC Classifications
B; B01; B01D; B01D46/00; F; F24; F24F; F24F8/00; F24F8/10; F24F8/108; F24F2221/00; F24F2221/12; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1844728A
Cited
US2415621A
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US2528301A
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US2621755A
Cited
US2633842A
Cited
US2700362A
Cited
US2873908A
Cited
US2999448A
Cited
US3158457A
Cited
US3277638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |