US3082695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impellers, especially single vane impellers for rotary pumps
Assignee: Klein Schanzlin and Becker AG
•
Filing: 1959-06-15
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Granted: 1963-03-26
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Expires: 1979-06-15
Abstract
No abstract record available.
Inventors
- 👤 Buschhorn Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2238; F04D29/225; F04D29/24; F04D29/242; F04D29/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN IMPELLER FOR CENTRIFUGAL PUMPS, SUBSTANTIALLY PROVIDING HYDRAULIC EQUALIZATION OVER THE ENTIRE OPERATING RANGE, COMPRISING AN IMPELLER, THE PASSAGE OF WHICH IS FORMED BY A SINGLE VANE EXTENDING IN THE FORM OF A SPIRAL APPROXIMATELY OVER 360*, THE CURVE OF SAID SPIRAL ESSENTIALLY CONFORMING TO THE EQUATION
Claim 2
Dependent Claim
47 words
AN IMPELLER FOR CENTRIFUGAL PUMPS, SUBSTANTIALLY PROVIDING HYDRAULIC EQUALIZATION OVER THE ENTIRE OPERATING RANGE, COMPRISING AN IMPELLER, THE PASSAGE OF WHICH IS FORMED BY A SINGLE VANE EXTENDING IN THE FORM OF A SPIRAL APPROXIMATELY OVER 360*, THE CURVE OF SAID SPIRAL ESSENTIALLY CONFORMING TO THE EQUATION
References Cited (Backward Citations)
DE23234C
Cited
US450491A
Cited
US963378A
Cited
GB340152A
Cited
US2245035A
Cited
US2655868A
Cited
US2853019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |