US3295686A
Expired / Lapsed
US
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Assignee: ROCKRIDGE LAB
•
Filing: 1965-05-20
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Granted: 1967-01-03
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Expires: 1985-05-20
Abstract
No abstract record available.
Inventors
- 👤 Albert P Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:46
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/001; B01D29/00; B01D29/01; B01D29/05; B01D29/085; B01D2201/00; B01D2201/40; B01D2201/4084
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
IN A DISPOSABLE FILTER UNIT, A HOLLOW BODY FOR THE RECEPTION OF A LIQUID TO BE FILTERED AND HAVING OPEN TOP AND BOTTOM ENDS, A SHEET-LIKE FILTER MEDIUM DISPOSED ADJACENT THE BOTTOM END OF THE BODY, A FUNNEL-LIKE MEMBER UNDERLYING THE FILTER MEDIUM AND SUPPORTING SAID FILTER MEDIUM, MEANS FORMING A PERMANENT LIQUID-TIGHT SEAL BETWEEN THE OUTER MARGIN OF THE FILTER MEDIUM, THE FUNNELLIKE MEMBER AND THE BOTTOM END OF THE BODY, SAID FUNNELLIKE MEMBER HAVING AN OPENING BELOW THE FILTER MEDIUM, A RECEPTACLE FOR RECEIVING A FILTERED LIQUID MOUNTED ON THE BODY BELOW THE FUNNEL-LIKE MEMBER, AND MEANS PERMANENTLY CONNECTING SAID BODY TO SAID RECEPTACLE, SAID RECEPTACLE BEING PROVIDED WITH A SHOULDER AND SAID FUNNELLIKE MEMBER RESTING UPON SAID SHOULDER.
References Cited (Backward Citations)
US321228A
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DE351704C
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US966963A
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US2449238A
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US2584206A
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US2781312A
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US2818178A
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US3085689A
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US3173868A
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US3206033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |