Patent US3347378A successfully refreshed from Google Patents.
US3347378A
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Assignee: Ajem Laboratories Inc
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Filing: 1966-06-14
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Granted: 1967-10-17
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Expires: 1986-06-14
Abstract
No abstract record available.
Inventors
- 👤 Orlan M Arnold
- 👤 Robert G Millhiser
- 👤 Umbricht Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:46
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/096; B01D29/60; B01D29/606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A FILTRATION APPARATUS HAVING A TANK FOR HOLDING A MASS OF LIQUID TO BE FILTERED, A FIRST SUCTION BOX WITHIN SAID TANK HAVING A FIRST PERVIOUS FACE FACING UPWARDS TO FORM A SEDIMENT-RECEIVING SURFACE, A SECOND SUCTION BOX WITHIN SAID TANK HAVING A SECOND PERVIOUS FACE OF GREATER AREA THAN SAID FIRST PERVIOUS FACE, SAID SECOND PERVIOUS FACE FACING DOWNWARD, A STRIP OF FILTER MEDIUM ARRANGED AT SAID PERVIOUS FACES FOR SERIAL PASSAGE THEREOVER, MEANS, INCLUDING AN ENDLESS SCREEN BELT DISPOSED BETWEEN SAID FILTER MEDIUM AND SAID PERVIOUS FILTER FACES, FOR MOVING SAID FILTER MEDIUM ACROSS SAID PERVIOUS FACES, A SUCTIONPRODUCING MEANS CONNECTED TO SAID SUCTION BOXES, SUCTION-DIVERTING MEANS FOR CHANGING SUCTION FROM ONE SUCTION BOX TO ANOTHER, AND PRESSURE-SENSING MEANS FOR ACTIVATING SAID SUCTION-DIVERTING MEANS AND SAID MOVING MEANS IN RESPONSE TO REDUCED PRESSURE WITHIN SAID FIRST SUCTION BOX.
Claim 2
Dependent Claim
140 words
A FILTRATION APPARATUS HAVING A TANK FOR HOLDING A MASS OF LIQUID TO BE FILTERED, A FIRST SUCTION BOX WITHIN SAID TANK HAVING A FIRST PERVIOUS FACE FACING UPWARDS TO FORM A SEDIMENT-RECEIVING SURFACE, A SECOND SUCTION BOX WITHIN SAID TANK HAVING A SECOND PERVIOUS FACE OF GREATER AREA THAN SAID FIRST PERVIOUS FACE, SAID SECOND PERVIOUS FACE FACING DOWNWARD, A STRIP OF FILTER MEDIUM ARRANGED AT SAID PERVIOUS FACES FOR SERIAL PASSAGE THEREOVER, MEANS, INCLUDING AN ENDLESS SCREEN BELT DISPOSED BETWEEN SAID FILTER MEDIUM AND SAID PERVIOUS FILTER FACES, FOR MOVING SAID FILTER MEDIUM ACROSS SAID PERVIOUS FACES, A SUCTIONPRODUCING MEANS CONNECTED TO SAID SUCTION BOXES, SUCTION-DIVERTING MEANS FOR CHANGING SUCTION FROM ONE SUCTION BOX TO ANOTHER, AND PRESSURE-SENSING MEANS FOR ACTIVATING SAID SUCTION-DIVERTING MEANS AND SAID MOVING MEANS IN RESPONSE TO REDUCED PRESSURE WITHIN SAID FIRST SUCTION BOX.
References Cited (Backward Citations)
US642460A
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US726052A
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US2720973A
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US2812065A
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US2867324A
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FR1146383A
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US3083831A
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US3087620A
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US3091336A
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US3221885A
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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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |