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Patent US3266311A successfully refreshed from Google Patents.
US3266311A
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Cryogenic liquid level sensing apparatus
Assignee: Delavan Manufacturing Co
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Filing: 1964-05-12
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Granted: 1966-08-16
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Expires: 1984-05-12
Abstract
No abstract record available.
Inventors
- 👤 Howard P Andreasen
- 👤 Donald H Munzenmaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:55
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/296; G01F23/2966; G01F23/2967
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
CRYOGENIC LIQUID LEVEL SENSING APPARATUS WHICH COMPRISES (A) A TRANSDUCER HAVING A MECHANICALLY OSCILLATORY ELEMENT ARRANGED FOR CONTACT BY A CRYOGENIC LIQUID WHOSE LEVEL IS TO BE SENSED, (B) DRIVING MEANS FOR PRODUCING OSCILLATION OF SAID ELEMENT, (C) PICKUP MEANS FOR PRODUCING AN A.-C. OUTPUT SIGNAL IN RESPONSE TO OSCILLATION OF SAID ELEMENT, (D) MEANS RESPONSIVE TO CHANGES IN SAID OUTPUT SIGNAL FOR INDICATING CONTACT OF SAID OSCILLATORY ELEMENT BY SAID LIQUID, (E) AND MEANS FOR DETECTING MODULATION OF SAID OUTPUT SIGNAL BY BOILING OF SAID CRYOGENIC LIQUID AT THE SURFACE OF SAID OSCILLATORY ELEMENT.
Claim 2
Dependent Claim
95 words
CRYOGENIC LIQUID LEVEL SENSING APPARATUS WHICH COMPRISES (A) A TRANSDUCER HAVING A MECHANICALLY OSCILLATORY ELEMENT ARRANGED FOR CONTACT BY A CRYOGENIC LIQUID WHOSE LEVEL IS TO BE SENSED, (B) DRIVING MEANS FOR PRODUCING OSCILLATION OF SAID ELEMENT, (C) PICKUP MEANS FOR PRODUCING AN A.-C. OUTPUT SIGNAL IN RESPONSE TO OSCILLATION OF SAID ELEMENT, (D) MEANS RESPONSIVE TO CHANGES IN SAID OUTPUT SIGNAL FOR INDICATING CONTACT OF SAID OSCILLATORY ELEMENT BY SAID LIQUID, (E) AND MEANS FOR DETECTING MODULATION OF SAID OUTPUT SIGNAL BY BOILING OF SAID CRYOGENIC LIQUID AT THE SURFACE OF SAID OSCILLATORY ELEMENT.
References Cited (Backward Citations)
US3139544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |