Patent US3274831A successfully refreshed from Google Patents.
US3274831A
Expired / Lapsed
US
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Electromagnetic flowmeter
Assignee: Individual
•
Filing: 1965-04-14
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Granted: 1966-09-27
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Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 Vincent J Cushing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:24
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
MAGNETIC FLOWMETER APPARATUS COMPRISING A TUBULAR MEANS OF DIELECTRIC MATERIAL THROUGH WHICH FLUID IS ADAPTED TO FLOW, MEANS FOR PRODUCING AN ALTERNATING MAGNETIC FIELD WITHIN SAID TUBULAR MEANS, DETECTING MEANS ADJACENT SAID TUBULAR MEANS AND WITHIN SAID MAGNETIC FIELD FOR DETECTING ELECTRICAL SIGNALS IN THE FLUID FLOWING THROUGH SAID TUBULAR MEANS, SAID DETECTING MEANS INCLUDING AT LEAST TWO SEPARATE DETECTING ELECTRODES ELECTRICALLY INSULATED FROM ONE ANOTHER, SHIELD MEANS DISPOSED DIRECTLY OUTWARDLY OF AT LEAST ONE OF SAID DETECTING ELECTRODES WITH RESPECT TO THE CENTER OF THE ADJACENT TUBULAR MEANS, AND AN ELECTRICAL NETWORK ELECTRICALLY CONNECTED WITH EACH OF SAID ELECTRODES AND WITH SAID SHIELD MEANS WHEREBY SAID ELECTRODES AND SAID SHIELD MEANS ARE ELECTRICALLY CONNECTED WITH ONE ANOTHER.
Claim 2
Dependent Claim
118 words
MAGNETIC FLOWMETER APPARATUS COMPRISING A TUBULAR MEANS OF DIELECTRIC MATERIAL THROUGH WHICH FLUID IS ADAPTED TO FLOW, MEANS FOR PRODUCING AN ALTERNATING MAGNETIC FIELD WITHIN SAID TUBULAR MEANS, DETECTING MEANS ADJACENT SAID TUBULAR MEANS AND WITHIN SAID MAGNETIC FIELD FOR DETECTING ELECTRICAL SIGNALS IN THE FLUID FLOWING THROUGH SAID TUBULAR MEANS, SAID DETECTING MEANS INCLUDING AT LEAST TWO SEPARATE DETECTING ELECTRODES ELECTRICALLY INSULATED FROM ONE ANOTHER, SHIELD MEANS DISPOSED DIRECTLY OUTWARDLY OF AT LEAST ONE OF SAID DETECTING ELECTRODES WITH RESPECT TO THE CENTER OF THE ADJACENT TUBULAR MEANS, AND AN ELECTRICAL NETWORK ELECTRICALLY CONNECTED WITH EACH OF SAID ELECTRODES AND WITH SAID SHIELD MEANS WHEREBY SAID ELECTRODES AND SAID SHIELD MEANS ARE ELECTRICALLY CONNECTED WITH ONE ANOTHER.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |