US3616802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering device
Assignee: FRANK A MARINACCIO
•
Filing: 1969-08-20
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Granted: 1971-11-02
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Expires: 1989-08-20
Abstract
Abstract A FILTER IS DISCLOSED WHICH INCLUDES AN ACCELERATING MEMBER AND A FLAP MEMBER. THE ACCELERATING MEMBER IS PERFORATED WITH A NUMBER OF HOLES OR ORIFICES, WHILE THE FLAP MEMBER INCLUDES AT LEAST ONE HINGED FLAP.
Inventors
- 👤 Frank A Marinaccio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:10
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04; A24D3/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |