US2774654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Tootal Broadhurst Lee Co Ltd
•
Filing: 1952-02-26
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Granted: 1956-12-18
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Expires: 1972-02-26
Abstract
No abstract record available.
Inventors
- 👤 Reed John Alva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:49
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/80; B01F27/81; B01F27/811; B01F27/8111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
AN APPARATUS FOR TREATING ONE SUBSTANCE WITH ANOTHER OF WHICH AT LEAST ONE IS A LIQUID COMPRISING A CYLINDRICAL TANK, A CENTRAL PASSAGE ELEMENT RISING FROM A LEVEL ABOVE THE BOTTOM OF THE TANK TO A LEVEL ABOVE THE TOP OF THE TANK, A CYLINDRICAL PARTITION WITHIN THE TANK SURROUNDING SAID CENTRAL PASSAGE ELEMENT WITH ITS UPPER END BELOW THE TOP OF THE TANK AND BELOW THE TOP OF THE CENTRAL PASSAGE ELEMENT AND ITS LOWER END ABOVE THE BOTTOM OF THE TANK TO DEFINE AN OUTER FLOW CHAMBER BETWEEN ITSELF AND THE CYLINDRICAL WALL OF THE TANK AND TO DEFINE AN INNER FLOW CHAMBER BETWEEN ITSELF AND SAID CENTRAL PASSAGE ELEMENT, A LOWER PARTITION EXTENDING FROM THE LOWER END OF SAID CYLINDRICAL PARTITION TO THE LOWER END OF SAID CENTRAL PASSAGE ELEMENT TO DEFINE BETWEEN ITSELF AND THE BOTTOM OF THE TANK A CONNECTING SPACE BETWEEN THE CENTRAL PASSAGE ELEMENT AND THE OUTER FLOW CHAMBER, AND AN IMPELLER LOCATED IN SAID CONNECTING SPACE IMMEDIATELY BENEATH THE CENTRAL PASSAGE ELEMENT, SAID CENTRAL PASSAGE ELEMENT HAVING AT LEAST ONE OPENING THEREIN BELOW THE MID-HEIGHT OF SAID CYLINDRICAL PARTITION AT A LEVEL ABOVE THE IMPELLER TO CONNECT THE CENTRAL PASSAGE ELEMENT WITH THE INNER FLOW CHAMBER.
Claim 2
Independent Claim
204 words
AN APPARATUS FOR TREATING ONE SUBSTANCE WITH ANOTHER OF WHICH AT LEAST ONE IS A LIQUID COMPRISING A CYLINDRICAL TANK, A CENTRAL PASSAGE ELEMENT RISING FROM A LEVEL ABOVE THE BOTTOM OF THE TANK TO A LEVEL ABOVE THE TOP OF THE TANK, A CYLINDRICAL PARTITION WITHIN THE TANK SURROUNDING SAID CENTRAL PASSAGE ELEMENT WITH ITS UPPER END BELOW THE TOP OF THE TANK AND BELOW THE TOP OF THE CENTRAL PASSAGE ELEMENT AND ITS LOWER END ABOVE THE BOTTOM OF THE TANK TO DEFINE AN OUTER FLOW CHAMBER BETWEEN ITSELF AND THE CYLINDRICAL WALL OF THE TANK AND TO DEFINE AN INNER FLOW CHAMBER BETWEEN ITSELF AND SAID CENTRAL PASSAGE ELEMENT, A LOWER PARTITION EXTENDING FROM THE LOWER END OF SAID CYLINDRICAL PARTITION TO THE LOWER END OF SAID CENTRAL PASSAGE ELEMENT TO DEFINE BETWEEN ITSELF AND THE BOTTOM OF THE TANK A CONNECTING SPACE BETWEEN THE CENTRAL PASSAGE ELEMENT AND THE OUTER FLOW CHAMBER, AND AN IMPELLER LOCATED IN SAID CONNECTING SPACE IMMEDIATELY BENEATH THE CENTRAL PASSAGE ELEMENT, SAID CENTRAL PASSAGE ELEMENT HAVING AT LEAST ONE OPENING THEREIN BELOW THE MID-HEIGHT OF SAID CYLINDRICAL PARTITION AT A LEVEL ABOVE THE IMPELLER TO CONNECT THE CENTRAL PASSAGE ELEMENT WITH THE INNER FLOW CHAMBER.
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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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |