US3278036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filtering apparatus with cleaning means
Assignee: Auto Klean Strainers Ltd
•
Filing: 1963-08-16
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Granted: 1966-10-11
•
Expires: 1983-08-16
Abstract
No abstract record available.
Inventors
- 👤 English Leonard Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:21
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; B; B01; B01D; B01D29/00; B01D29/11; B01D29/117; B01D29/50; B01D29/52; B01D29/54; B01D29/62; B01D29/66; B01D29/668; C09; C09K; C09K23/00; C09K23/16; C11; C11D; C11D1/00; C11D1/38; C11D1/40; C11D3/00; C11D3/16; C11D3/26; C11D3/30; D; D06; D06M; D06M13/00; D06M13/322; D06M13/325; D06M13/368; D06M13/372; D06M13/46; D06M13/463; D06M13/467; D06M2200/00; D06M2200/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
LIQUID FILTERING APPARATUS COMPRISING A HOUSING, INLET, OUTLET AND REFLUX PORTS IN THE HOUSING, A VALVE BLOCK OF CIRCULAR CROSS-SECTIONAL SHAPE ROTATABLY MOUNTED IN THE HOUSING, AND END FACE ON THE VALVE BLOCK, A PLURALITY OF ANNULAR FILTERING UNITS ARRANGED ONE WITHIN THE OTHER COAXIALLY ON SAID FACE, ONE SIDE OF EACH OF THE UNITS COMMUNICATING WITH THE OUTLET PORT, MEANS FOR ROTATING THE VALVE BLOCK AND PASSAGES IN THE VALVE BLOCK WHICH COMMUNICATE WITH THE OTHER SIDE OF SAID UNITS AND SELECTIVELY WITH THE INLET PORT AND THE REFLUX PORT UPON ROTATION OF THE VALVE BLOCK.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
US2854142A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |