US3302458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level sensing device
Assignee: American Radiator and Standard Sanitary Corp
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Filing: 1963-10-09
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Granted: 1967-02-07
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Expires: 1983-10-09
Abstract
No abstract record available.
Inventors
- 👤 Marvin D Scadron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:07
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
APPARATUS FOR TRANSLATING THE INSTANTANEOUS DEPTH OF A BODY OF LIQUID OF VARYING LEVEL INTO AN ELECTRICAL POTENTIAL TO PROVIDE A MEASURE OF SUCH DEPTH COMPRISING: AN ELONGATED, MAIN, ELECTRICALLY-CONDUCTIVE ELEMENT HAVING A COMPARATIVELY HIGH TEMPERATURE COEFFICIENT OF RESISTANCE, SAID ELEMENT BEING POSITIONED WITH THE AXIS OF THE ELEMENT PERPENDICULAR TO THE SURFACE OF THE LIQUID TO BE IMMERSED IN VARYING DEGREE AS THE LIQUID LEVEL RISES AND FALLS, THE ELEMENT HAVING AN OVERALL LENGTH SUBSTANTIALLY EQUAL TO THE EXPECTED MAXIMUM DEPTH OF THE BODY OF LIQUID, A SOURCE OF CURRENT CONNECTED TO SAID ELEMENT TO HEAT THE SAME, A COMPENSATING ELEMENT CHARACTERIZED BY SUBSTANTIALLY THE SAME TEMPERATURE COEFFICIENT OF RESISTANCE AS
Claim 2
Dependent Claim
112 words
APPARATUS FOR TRANSLATING THE INSTANTANEOUS DEPTH OF A BODY OF LIQUID OF VARYING LEVEL INTO AN ELECTRICAL POTENTIAL TO PROVIDE A MEASURE OF SUCH DEPTH COMPRISING: AN ELONGATED, MAIN, ELECTRICALLY-CONDUCTIVE ELEMENT HAVING A COMPARATIVELY HIGH TEMPERATURE COEFFICIENT OF RESISTANCE, SAID ELEMENT BEING POSITIONED WITH THE AXIS OF THE ELEMENT PERPENDICULAR TO THE SURFACE OF THE LIQUID TO BE IMMERSED IN VARYING DEGREE AS THE LIQUID LEVEL RISES AND FALLS, THE ELEMENT HAVING AN OVERALL LENGTH SUBSTANTIALLY EQUAL TO THE EXPECTED MAXIMUM DEPTH OF THE BODY OF LIQUID, A SOURCE OF CURRENT CONNECTED TO SAID ELEMENT TO HEAT THE SAME, A COMPENSATING ELEMENT CHARACTERIZED BY SUBSTANTIALLY THE SAME TEMPERATURE COEFFICIENT OF RESISTANCE AS
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |