US3151065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic filtration system
Assignee: Detrex Corp
•
Filing: 1961-04-25
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Granted: 1964-09-29
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Expires: 1981-04-25
Abstract
No abstract record available.
Inventors
- 👤 Jack C Smith
- 👤 Edwin E Etterman
- 👤 Roy T Romine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:12
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/52; B01D29/11; B01D29/13; B01D29/15; B01D29/62; B01D29/66; B01D29/88; B01D29/90; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0453; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
IN A FILTERING APPARATUS FOR REMOVING SOLID SOILS FROM A LIQUID, SAID APPARATUS COMPRISING: A RESERVOIR FOR SAID LIQUID; A MAIN FILLTER; A SECONDARY FILTER OF THE ROTATABLE CENTRIFUGE TYPE ADAPTED TO FUNCTION AS A SUB-FILTER AND MUCH STORAGE CONTAINER; AN AUTOMATIC FILTER POWDER DISPENSER MOUNTED ON SAID RESERVOIR AND HAVING A ROTATABLE FEED MECHANISM ADAPTED TO DISPENSE INTO SAID RESERVOIR A UNIFORM QUANTITY OF DRY FILTER POWDER FOR EACH ROTATION OF SAID FEEDING MECHANISM; CONDUIT MEANS INTERCONNECTING SAID MAIN FILTER, RESERVOIR AND SECONDARY FILTER; VALVE MEANS FOR CONTROLLIG THE DIRECTION OF FLOW THROUGH SAID CONDUIT MEANS; ELECTRICALLY RESPONSIVE VALVE OPERATOR MEANS, INCLUDING VALVE OPERATOR SWITH MEANS; A PUMP FOR FLOWING SAID LIQUID UNDER PRESSURE THROUGH SAID CONDUIT MEANS, MAIN FILTER, RESERVOIR AND SECONDARY FILTER; PRESSURE SENSITIVE SWITCH MEANS IN THE CONDUIT MEANS CONNECTING SAID RESERVOIR TO SAID MAIN FILTER AND ADAPTED TO BE ACTUATED WHEN THE FLOW PRESSURE RISES ABOVE A SELECTED VALVE; RELAY CONTROL MEANS CONNECTED ELECTRICALLY TO SAID PRESSURESENSITIVE SWITCH MEANS AND TO SAID VALVE OPERATOR MEANS AND ACTUABLE IN RESPONSE TO ACTUATION OF SAID PRESSURE
Claim 2
Dependent Claim
179 words
IN A FILTERING APPARATUS FOR REMOVING SOLID SOILS FROM A LIQUID, SAID APPARATUS COMPRISING: A RESERVOIR FOR SAID LIQUID; A MAIN FILLTER; A SECONDARY FILTER OF THE ROTATABLE CENTRIFUGE TYPE ADAPTED TO FUNCTION AS A SUB-FILTER AND MUCH STORAGE CONTAINER; AN AUTOMATIC FILTER POWDER DISPENSER MOUNTED ON SAID RESERVOIR AND HAVING A ROTATABLE FEED MECHANISM ADAPTED TO DISPENSE INTO SAID RESERVOIR A UNIFORM QUANTITY OF DRY FILTER POWDER FOR EACH ROTATION OF SAID FEEDING MECHANISM; CONDUIT MEANS INTERCONNECTING SAID MAIN FILTER, RESERVOIR AND SECONDARY FILTER; VALVE MEANS FOR CONTROLLIG THE DIRECTION OF FLOW THROUGH SAID CONDUIT MEANS; ELECTRICALLY RESPONSIVE VALVE OPERATOR MEANS, INCLUDING VALVE OPERATOR SWITH MEANS; A PUMP FOR FLOWING SAID LIQUID UNDER PRESSURE THROUGH SAID CONDUIT MEANS, MAIN FILTER, RESERVOIR AND SECONDARY FILTER; PRESSURE SENSITIVE SWITCH MEANS IN THE CONDUIT MEANS CONNECTING SAID RESERVOIR TO SAID MAIN FILTER AND ADAPTED TO BE ACTUATED WHEN THE FLOW PRESSURE RISES ABOVE A SELECTED VALVE; RELAY CONTROL MEANS CONNECTED ELECTRICALLY TO SAID PRESSURESENSITIVE SWITCH MEANS AND TO SAID VALVE OPERATOR MEANS AND ACTUABLE IN RESPONSE TO ACTUATION OF SAID PRESSURE
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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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |