US3139832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal enclosed inert pump
Assignee: Individual
•
Filing: 1963-07-24
•
Granted: 1964-07-07
•
Expires: 1983-07-24
Abstract
No abstract record available.
Inventors
- 👤 Alan P Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:42
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2227; A; A61; A61M; A61M1/00; A61M1/80; A61M60/00; A61M60/20; A61M60/205; A61M60/216; A61M60/226; A61M60/232; A61M60/40; A61M60/403; A61M60/419; A61M60/80; A61M60/802; A61M60/81; A61M60/818; A61M60/825; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/026; F04D29/2238; F04D29/2255; A61M15/00; A61M15/0065; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43; F05D2300/432; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A CENTRIFUGAL PUMP COMPRISING A GLASS CHAMBER HAVING AN ANNULAR WALL, A FLUID-OUTLET TUBE EXTENDING TANGENTIALLY THEREFROM, AN UPPER WALL AND A FLUID-INLET TUBE EXTENDING VERTICALLY THEREFROM, A ROTARY GLASS IMPELLER COMPRISED OF CROSSED TUBES IN A GENERALLY HORIZONTAL PLANE, AN IMPELLER-INLET TUBE AT THE POSITION OF JUNCTURE OF SAID CROSSED TUBES EXTENDING VERTICALLY THEREFROM AND INTO SAID FLUID-INLET TUBE AND A PROTUBERANCE DEPENDING FROM SAID CROSSED TUBES OPPOSITE SAID IMPELLER-INLET TUBE, A MAGNET, MEANS REMOVABLY RETAINING SAID MAGNET IN ONE OF SAID CROSSED TUBES, A FIRST TUBULAR BEARING MADE OF A MATERIAL WHICH IS SUBSTANTIALLY ALKALI AND ACID RESISTANT, IS ELASTIC AND HAS A LOW COEFFICIENT OF FRICTION INTERPOSED BETWEEN SAID FLUID-INLET AND IMPELLER-INLET TUBES AND A SECOND BEARING RECEIVING SAID PROTUBERANCE AND MADE OF A MATERIAL WHICH IS SUBSTANTIALLY ALKALI AND ACID RESISTANT,
Claim 2
Dependent Claim
135 words
A CENTRIFUGAL PUMP COMPRISING A GLASS CHAMBER HAVING AN ANNULAR WALL, A FLUID-OUTLET TUBE EXTENDING TANGENTIALLY THEREFROM, AN UPPER WALL AND A FLUID-INLET TUBE EXTENDING VERTICALLY THEREFROM, A ROTARY GLASS IMPELLER COMPRISED OF CROSSED TUBES IN A GENERALLY HORIZONTAL PLANE, AN IMPELLER-INLET TUBE AT THE POSITION OF JUNCTURE OF SAID CROSSED TUBES EXTENDING VERTICALLY THEREFROM AND INTO SAID FLUID-INLET TUBE AND A PROTUBERANCE DEPENDING FROM SAID CROSSED TUBES OPPOSITE SAID IMPELLER-INLET TUBE, A MAGNET, MEANS REMOVABLY RETAINING SAID MAGNET IN ONE OF SAID CROSSED TUBES, A FIRST TUBULAR BEARING MADE OF A MATERIAL WHICH IS SUBSTANTIALLY ALKALI AND ACID RESISTANT, IS ELASTIC AND HAS A LOW COEFFICIENT OF FRICTION INTERPOSED BETWEEN SAID FLUID-INLET AND IMPELLER-INLET TUBES AND A SECOND BEARING RECEIVING SAID PROTUBERANCE AND MADE OF A MATERIAL WHICH IS SUBSTANTIALLY ALKALI AND ACID RESISTANT,
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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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |