Patent US2366500A successfully refreshed from Google Patents.
US3241297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag filtering apparatus
Assignee: Phillips Petroleum Co
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Filing: 1962-04-13
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Granted: 1966-03-22
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Expires: 1982-04-13
Abstract
No abstract record available.
Inventors
- 👤 Lewis F Hanes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/70; B01D2265/00; B01D2265/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN COMBINATION A POROUS ELONGATED CYLINDRICAL FILTER BAG FORMED OF FLEXIBLE MATERIAL, HAVING AN OPEN FIXED BOTTOM END AND A CLOSED SUSPENDED TOP END, SAID BAG BEING IN UPRIGHT POSITION WITH ITS CLOSED END AT THE TOP; A TRANSVERSE PARTITION ENTIRELY WITHIN THE LOWER HALF OF SAID BAG OF RELATIVELY SHORT VERTICAL EXTENT, SPACED SUBSTANTIALLY FROM ITS LOWER END, THE OUTER PERIPHERY OF SAID PARTITION BEING OF SUBSTANTIALY THE SAME DIAMETER AS SAID BAG; RIGID RING MEANS ATTACHING THE OUTER PERIPHERY OF SAID PARTITION TO SAID BAG; A CHOKE IN SAID PARTITION CONSISTING OF AN ORIFICE HAVING AN AREA IN THE RANGE OF 5 TO 55 PERCENT OF THE CROSS SECTIONAL AREA OF SAID BAG, THE CHOKING EFFECT OF SAID CHOKE PREVENTING BAG-POPPING DURING SUBSEQUENT REPRESSURING OF THE INSIDE OF THE BAG AFTER BACKFLOW INTO THE BAG THRU THE WALLS THEREOF TO REMOVE SOLIDS.
Claim 2
Dependent Claim
144 words
IN COMBINATION A POROUS ELONGATED CYLINDRICAL FILTER BAG FORMED OF FLEXIBLE MATERIAL, HAVING AN OPEN FIXED BOTTOM END AND A CLOSED SUSPENDED TOP END, SAID BAG BEING IN UPRIGHT POSITION WITH ITS CLOSED END AT THE TOP; A TRANSVERSE PARTITION ENTIRELY WITHIN THE LOWER HALF OF SAID BAG OF RELATIVELY SHORT VERTICAL EXTENT, SPACED SUBSTANTIALLY FROM ITS LOWER END, THE OUTER PERIPHERY OF SAID PARTITION BEING OF SUBSTANTIALY THE SAME DIAMETER AS SAID BAG; RIGID RING MEANS ATTACHING THE OUTER PERIPHERY OF SAID PARTITION TO SAID BAG; A CHOKE IN SAID PARTITION CONSISTING OF AN ORIFICE HAVING AN AREA IN THE RANGE OF 5 TO 55 PERCENT OF THE CROSS SECTIONAL AREA OF SAID BAG, THE CHOKING EFFECT OF SAID CHOKE PREVENTING BAG-POPPING DURING SUBSEQUENT REPRESSURING OF THE INSIDE OF THE BAG AFTER BACKFLOW INTO THE BAG THRU THE WALLS THEREOF TO REMOVE SOLIDS.
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |