Patent US3368404A successfully refreshed from Google Patents.
US3368404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for finding and monitoring a liquid level
Assignee: Panhandle Eastern Pipe Line Co
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Filing: 1966-05-23
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Granted: 1968-02-13
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Expires: 1986-05-23
Abstract
No abstract record available.
Inventors
- 👤 William R King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:10
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
AN APPARATUS FOR MONITORING THE LOCATION OF A LIQUID LEVEL COMPRISING: (A) SENSING MEANS INCLUDING FIRST, SECOND AND THIRD ELECTRODES DISPOSED AT SPACED ELEVATIONS, SAID ELECTRODES BEING IN AN INACTIVE POSITION RELATIVE TO SAID LIQUID LEVEL WITH SAID FIRST ELECTRODE BEING ELEVATED ABOVE SAID LIQUID LEVEL, SAID SECOND ELECTRODE BEING IN CONTACTING RELATION TO SAID LIQUID AND THE THIRD ELECTRODE BEING SUBMERGED IN SAID LIQUID, (B) A FIRST CIRCUIT MEANS OPERATIVELY CONNECTED TO SAID FIRST AND SECOND ELECTRODES WHEREBY CURRENT FLOW IS INDUCED BETWEEN SAID FIRST AND SECOND ELECTRODES WHEN THE LIQUID LEVEL RISES TO CONTACTING RELATION WITH SAID FIRST ELECTRODE, (C) A SECOND CIRCUIT MEANS OPERATIVELY CONNECTED TO SAID SECOND AND THIRD ELECTRODES WHEREBY CURRENT FLOWS BETWEEN SAID SECOND AND THIRD ELECTRODE THROUGH SAID LIQUID, (D) MEANS OPERATIVELY CONNECTED TO SAID SENSING MEANS AND RESPONSIVE TO CURRENT FLOW IN SAID FIRST CIRCUIT MEANS TO RAISE SAID SENSING MEANS TO SAID INACTIVE POSITION AND RESPONSIVE TO A BREAK IN CURRENT FLOW IN SAID SECOND CIRCUIT MEANS TO LOWER SAID SENSING MEANS TO SAID INACTIVE POSITION.
Claim 2
Independent Claim
175 words
AN APPARATUS FOR MONITORING THE LOCATION OF A LIQUID LEVEL COMPRISING: (A) SENSING MEANS INCLUDING FIRST, SECOND AND THIRD ELECTRODES DISPOSED AT SPACED ELEVATIONS, SAID ELECTRODES BEING IN AN INACTIVE POSITION RELATIVE TO SAID LIQUID LEVEL WITH SAID FIRST ELECTRODE BEING ELEVATED ABOVE SAID LIQUID LEVEL, SAID SECOND ELECTRODE BEING IN CONTACTING RELATION TO SAID LIQUID AND THE THIRD ELECTRODE BEING SUBMERGED IN SAID LIQUID, (B) A FIRST CIRCUIT MEANS OPERATIVELY CONNECTED TO SAID FIRST AND SECOND ELECTRODES WHEREBY CURRENT FLOW IS INDUCED BETWEEN SAID FIRST AND SECOND ELECTRODES WHEN THE LIQUID LEVEL RISES TO CONTACTING RELATION WITH SAID FIRST ELECTRODE, (C) A SECOND CIRCUIT MEANS OPERATIVELY CONNECTED TO SAID SECOND AND THIRD ELECTRODES WHEREBY CURRENT FLOWS BETWEEN SAID SECOND AND THIRD ELECTRODE THROUGH SAID LIQUID, (D) MEANS OPERATIVELY CONNECTED TO SAID SENSING MEANS AND RESPONSIVE TO CURRENT FLOW IN SAID FIRST CIRCUIT MEANS TO RAISE SAID SENSING MEANS TO SAID INACTIVE POSITION AND RESPONSIVE TO A BREAK IN CURRENT FLOW IN SAID SECOND CIRCUIT MEANS TO LOWER SAID SENSING MEANS TO SAID INACTIVE POSITION.
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) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |