US3077989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic self cleaning filter apparatus
Assignee: Phillips Petroleum Co
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Filing: 1958-09-05
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Granted: 1963-02-19
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Expires: 1978-09-05
Abstract
No abstract record available.
Inventors
- 👤 Mark E Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:21
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; B01D29/00; B01D29/01; B01D29/50; B01D29/52; B01D29/54; B01D29/62; B01D29/66; B01D29/665
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
A FILTER APPARATUS COMPRISING IN COMBINATION: A CASING HAVING SEPARATED FIRST AND SECOND CHAMBERS THEREIN; A SEPARATE FILTER MEANS MOVEABLY MOUNTED IN EACH OF SAID CHAMBERS AND DIVIDING ITS RESPECTIVE CHAMBER IN WHICH IT IS MOUNTED INTO A FIRST CHAMBER PORTION AND A SECOND CHAMBER PORTION; EACH OF SAID CHAMBERS HAVING: A FIRST INLET COMMUNICATING WITH ITS SAID FIRST CHAMBER PORTION FOR THE INTRODUCTION OF FILTER FEED THERETO; A FIRST OUTLET COMMUNICATING WITH ITS SAID SECOND CHAMBER PORTION FOR THE WITHDRAWAL OF FILTERED FLUID THEREFROM; A SECOND INLET COMMUNICATING WITH ITS SAID SECOND CHAMBER PORTION FOR THE INTRODUCTION OF WASH FLUID THERETO; AND A SECOND OUTLET COMMUNICATING WITH ITS SAID FIRST CHAMBER PORTION FOR WITHDRAWAL OF USED WASH FLUID THEREFROM; FIRST CONDUIT MEANS COMMUNICATING WITH SAID FIRST OUTLETS OF EACH OF SAID CHAMBERS TO WITHDRAW FILTERED FLUID THEREFROM; SECOND CONDUIT MEANS COMMUNICATING WITH SAID FIRST CONDUIT MEANS AND EACH OF SAID SECOND INLETS FOR SUPPLYING SAID CHAMBERS WITH FILTERED FLUID TO BE USED AS SAID WASH FLUID; THIRD CONDUIT MEANS COMMUNICATING WITH SAID SECOND OUTLETS TO WITHDRAW USED WASH LIQUID FROM EACH OF SAID CHAMBERS; FLOW CONTROL MEANS FOR CONTROLLING THE OPENING AND CLOSING OF EACH OF SAID INLETS AND OUTLETS; SHUTTLE VALVE MEANS CONNECTED TO SAID FLOW CONTROL MEANS TO ACTUATE THE SAME AND MOVEABLY MOUNTED
Claim 2
Dependent Claim
217 words
A FILTER APPARATUS COMPRISING IN COMBINATION: A CASING HAVING SEPARATED FIRST AND SECOND CHAMBERS THEREIN; A SEPARATE FILTER MEANS MOVEABLY MOUNTED IN EACH OF SAID CHAMBERS AND DIVIDING ITS RESPECTIVE CHAMBER IN WHICH IT IS MOUNTED INTO A FIRST CHAMBER PORTION AND A SECOND CHAMBER PORTION; EACH OF SAID CHAMBERS HAVING: A FIRST INLET COMMUNICATING WITH ITS SAID FIRST CHAMBER PORTION FOR THE INTRODUCTION OF FILTER FEED THERETO; A FIRST OUTLET COMMUNICATING WITH ITS SAID SECOND CHAMBER PORTION FOR THE WITHDRAWAL OF FILTERED FLUID THEREFROM; A SECOND INLET COMMUNICATING WITH ITS SAID SECOND CHAMBER PORTION FOR THE INTRODUCTION OF WASH FLUID THERETO; AND A SECOND OUTLET COMMUNICATING WITH ITS SAID FIRST CHAMBER PORTION FOR WITHDRAWAL OF USED WASH FLUID THEREFROM; FIRST CONDUIT MEANS COMMUNICATING WITH SAID FIRST OUTLETS OF EACH OF SAID CHAMBERS TO WITHDRAW FILTERED FLUID THEREFROM; SECOND CONDUIT MEANS COMMUNICATING WITH SAID FIRST CONDUIT MEANS AND EACH OF SAID SECOND INLETS FOR SUPPLYING SAID CHAMBERS WITH FILTERED FLUID TO BE USED AS SAID WASH FLUID; THIRD CONDUIT MEANS COMMUNICATING WITH SAID SECOND OUTLETS TO WITHDRAW USED WASH LIQUID FROM EACH OF SAID CHAMBERS; FLOW CONTROL MEANS FOR CONTROLLING THE OPENING AND CLOSING OF EACH OF SAID INLETS AND OUTLETS; SHUTTLE VALVE MEANS CONNECTED TO SAID FLOW CONTROL MEANS TO ACTUATE THE SAME AND MOVEABLY MOUNTED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |