Patent DE113185C successfully refreshed from Google Patents.
Patent US3336875A successfully refreshed from Google Patents.
US3336875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep well pump
Assignee: Alfred Conhagen Inc
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Filing: 1966-02-18
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Granted: 1967-08-22
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Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Conhagen Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:00
CPC Classifications
F; F04; F04D; F04D1/00; F04D1/14; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A CENTRIFUGAL PUMP, COMPRISING A STATIONARY GENERALLY CYLINDRICAL AXIALLY VERTICAL CASING, SAID CASING HAVING A FIRST PARTITION THEREIN DIVIDING THE CASING INTO A LOWER RESERVOIR CHAMBER AND AN UPPER LIQUID DISCHARGE CHAMBER, SAID LIQUID DISCHARGE CHAMBER HAVING AN OUTLET PORT, SAID CASING HAVING A BOTTOM WALL WITH AN OPENING THEREIN, A FRIST AXIALLY VERTICAL TUBE SECURED NONROTATIONALLY TO THE BOTTOM WALL OF THE CASING AT SAID OPENING, A ROTARY AXIALLY VERTICAL SECOND TUBE DISPOSED INSIDE THE FIRST TUBE CONCENTRIC AND COAXIAL THEREWITH, BEARINGS AT UPPER AND LOWER ENDS OF THE SECOND TUBE ROTATABLY ENGAGING THE SECOND TUBE TO THE FIRST TUBE, SAID SECOND TUBE AT ITS UPPER END EXTENDING INTO SAID RESERVOIR CHAMBER, A MULTIPLE WIND PARTITION SECURED IN AND EXTENDING LONGITUDINALLY OF THE SECOND TUBE DIVIDING THE SAME INTO A PLURALITY OF NARROW PASSAGES TO ADMIT LIQUID INTO SAID PASSAGES, SAID SECOND
Claim 2
Dependent Claim
143 words
A CENTRIFUGAL PUMP, COMPRISING A STATIONARY GENERALLY CYLINDRICAL AXIALLY VERTICAL CASING, SAID CASING HAVING A FIRST PARTITION THEREIN DIVIDING THE CASING INTO A LOWER RESERVOIR CHAMBER AND AN UPPER LIQUID DISCHARGE CHAMBER, SAID LIQUID DISCHARGE CHAMBER HAVING AN OUTLET PORT, SAID CASING HAVING A BOTTOM WALL WITH AN OPENING THEREIN, A FRIST AXIALLY VERTICAL TUBE SECURED NONROTATIONALLY TO THE BOTTOM WALL OF THE CASING AT SAID OPENING, A ROTARY AXIALLY VERTICAL SECOND TUBE DISPOSED INSIDE THE FIRST TUBE CONCENTRIC AND COAXIAL THEREWITH, BEARINGS AT UPPER AND LOWER ENDS OF THE SECOND TUBE ROTATABLY ENGAGING THE SECOND TUBE TO THE FIRST TUBE, SAID SECOND TUBE AT ITS UPPER END EXTENDING INTO SAID RESERVOIR CHAMBER, A MULTIPLE WIND PARTITION SECURED IN AND EXTENDING LONGITUDINALLY OF THE SECOND TUBE DIVIDING THE SAME INTO A PLURALITY OF NARROW PASSAGES TO ADMIT LIQUID INTO SAID PASSAGES, SAID SECOND
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |