US3297307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage circulators
Assignee: H Krantz GmbH and Co
•
Filing: 1964-01-29
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Granted: 1967-01-10
•
Expires: 1984-01-29
Abstract
No abstract record available.
Inventors
- 👤 Jahns Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:19
CPC Classifications
F; F04; F04D; F04D3/00; B; B01; B01F; B01F27/00; B01F27/80; B01F27/81; B01F27/812; F04D15/00; F04D15/0005; F04D15/0011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A FLUID CIRCULATOR SYSTEM, A PRESSURE CONTAINER AND A MULTI-STAGE AXIAL FLOW CIRCULATOR MOUNTED WITHIN SAID PRESSURE CONTAINER FOR LIQUID PROCESSING, SAID CIRCULATOR HAVING A CYLINDRICAL PUMP HOUSING COMPOSED OF A PLURALITY OF CYLINDRICAL FIXED SLEEVES, A PLURALITY OF STAGES RANGING FROM THE FIRST STAGE TO THE LAST STAGE INCLUDING A CENTRAL SHAFT DRIVING A PLURALITY OF LIQUID ACTIVATING MEMBERS ARRANGED SO THAT THERE WILL BE ONE MEMBER FOR EACH STAGE AND ONE MEMBER WITHIN EACH SLEEVE, ONE STAGE OF SAID PUMP HAVING ITS FIXED SLEEVE PROVIDED WITH A PLURALITY OF PORTS THEREIN AROUND THE PERIPHERY THEREOF AND A MOVABLE PORTING SLEEVE POSITIONED AROUND SAID PORTED
Claim 2
Dependent Claim
107 words
IN A FLUID CIRCULATOR SYSTEM, A PRESSURE CONTAINER AND A MULTI-STAGE AXIAL FLOW CIRCULATOR MOUNTED WITHIN SAID PRESSURE CONTAINER FOR LIQUID PROCESSING, SAID CIRCULATOR HAVING A CYLINDRICAL PUMP HOUSING COMPOSED OF A PLURALITY OF CYLINDRICAL FIXED SLEEVES, A PLURALITY OF STAGES RANGING FROM THE FIRST STAGE TO THE LAST STAGE INCLUDING A CENTRAL SHAFT DRIVING A PLURALITY OF LIQUID ACTIVATING MEMBERS ARRANGED SO THAT THERE WILL BE ONE MEMBER FOR EACH STAGE AND ONE MEMBER WITHIN EACH SLEEVE, ONE STAGE OF SAID PUMP HAVING ITS FIXED SLEEVE PROVIDED WITH A PLURALITY OF PORTS THEREIN AROUND THE PERIPHERY THEREOF AND A MOVABLE PORTING SLEEVE POSITIONED AROUND SAID PORTED
References Cited (Backward Citations)
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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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |