US2710099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning filters
Assignee: Infilco Inc
•
Filing: 1949-08-20
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Granted: 1955-06-07
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Expires: 1969-08-20
Abstract
No abstract record available.
Inventors
- 👤 Anton A Kalinske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:40
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/52; B01D29/11; B01D29/114; B01D29/44; B01D29/48; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446; B01D2201/20; B01D2201/204; B01D2201/208; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A DIATOMITE FILTER INCLUDING A CASING HAVING A TOP, AN INLET FOR THE LIQUID TO BE FILTERED, AN OUTLET FOR THE FILTERED LIQUID, AN INLET CONDUIT DISCHARGING INTO SAID CASING THROUGH SAID INLET, A FILTER ELEMENT INTERPOSED BETWEEN SAID INLET AND SAID OUTLET, WALL MEANS FORMING AN AIR SPACE IN OPEN COMMUNICATION WITH THE LIQUID UPSTREAM OF SAID ELEMENT, SAID TOP FORMING A SECOND AIR SPACE IN OPEN COMMUNICATION WITH LIQUID DOWNSTREAM OF SAID ELEMENT, A VENT FROM SAID FIRST AIR SPACE, AND A QUICK ACTING VALVE ON SAID VENT: THE COMBINATION WITH SAID INLET CONDUIT OF ASPIRATING MEANS FOR INTRODUCING A GAS INTO SAID INLET CONDUIT AND DISCHARGING IT UNDER LIQUID INLET PRESSURE INTO SAID CASING DURING FILTERING
Claim 2
Dependent Claim
120 words
IN A DIATOMITE FILTER INCLUDING A CASING HAVING A TOP, AN INLET FOR THE LIQUID TO BE FILTERED, AN OUTLET FOR THE FILTERED LIQUID, AN INLET CONDUIT DISCHARGING INTO SAID CASING THROUGH SAID INLET, A FILTER ELEMENT INTERPOSED BETWEEN SAID INLET AND SAID OUTLET, WALL MEANS FORMING AN AIR SPACE IN OPEN COMMUNICATION WITH THE LIQUID UPSTREAM OF SAID ELEMENT, SAID TOP FORMING A SECOND AIR SPACE IN OPEN COMMUNICATION WITH LIQUID DOWNSTREAM OF SAID ELEMENT, A VENT FROM SAID FIRST AIR SPACE, AND A QUICK ACTING VALVE ON SAID VENT: THE COMBINATION WITH SAID INLET CONDUIT OF ASPIRATING MEANS FOR INTRODUCING A GAS INTO SAID INLET CONDUIT AND DISCHARGING IT UNDER LIQUID INLET PRESSURE INTO SAID CASING DURING FILTERING
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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) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |