US3145567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level indicator
Assignee: Nucor Corp
•
Filing: 1958-11-17
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Granted: 1964-08-25
•
Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Bobrowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:49
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/241
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
APPARATUS FOR DETECTING THE LEVEL OF LIQUID IN A TANK INCLUDING IN COMBINATION A SUPPORT EXTENDING GENERALLY UPWARDLY IN SAID TANK, A CONDUCTOR HELICALLY WOUND AROUND SAID SUPPORT, A PLURALITY OF TAPS CONNECTED TO SAID CONDUCTOR AT SPACED POINTS WITHIN SAID TANK INTERMEDIATE THE LENGTH OF SAID SUPPORT TO DIVIDE SAID CONDUCTOR INTO A PLURALITY OF RESISTIVE ELEMENTS AND MEANS CONNECTED TO SAID TAPS FOR PRODUCING A SIGNAL IN RESPONSE TO A CHANGE IN THE RELATIVE RESISTANCE OF A PAIR OF ADJACENT RESISTIVE ELEMENTS TO INDICATE THE LEVEL OF SAID LIQUID.
References Cited (Backward Citations)
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Cited
US2211606A
Cited
US2456617A
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US2694930A
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US2667178A
Cited
CH318219A
Cited
US2766406A
Cited
US2894390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |