Patent US3097496A successfully refreshed from Google Patents.
US3097496A
Expired / Lapsed
US
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Assignee: —
•
Filing: —
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Granted: 1963-07-16
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Expires: 1980-07-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:09
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247; F; F17; F17C; F17C13/00; F17C13/02; F17C13/021; G05; G05D; G05D9/00; G05D9/12; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0332; F17C2221/00; F17C2221/01; F17C2221/014; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0408; F17C2250/0417; F17C2250/0486; F17C2250/0491; F17C2250/06; F17C2250/0605; F17C2250/061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
THE METHOD OF MAINTAINING THE LEVEL OF A CRYOGENIC LIQUID IN A RESERVOIR AT A SUBSTANTIALLY CONSTANT ELEVATION, SAID METHOD COMPRISING: DISPOSING A SEMICONDUCTOR DIODE IN SAID LIQUID AT THE TOP SURFACE THEREOF; CONNECTING SAID DIODE IN AN ELECTRICAL CIRCUIT INCLUDING CONTROL MEANS FOR REGULATING THE FLOW OF ADDITIONAL CRYOGENIC LIQUID INTO SAID RESERVOIR, SAID CONTROL MEANS BEING RESPONSIVE TO RESISTANCE CHANGES IN SAID DIODE WHEREBY ADDITIONAL CRYOGENIC LIQUID IS ADMITTED TO SAID RESERVOIR WHEN THE LEVEL OF THE CRYOGENIC LIQUID THEREIN DROPS TO AN ELEVATION WHERE THE SAID DIODE IS NO LONGER DISPOSED THEREIN AND ADDITIONAL CRYOGENIC LIQUID IS PREVENTED FROM ENTERING SAID RESERVOIR WHEN SAID DIODE IS DISPOSED IN SAID LIQUID IN SAID RESERVOIR; AND ELECTRICALLY CONNECTING A TIME DELAY RELAY AND A WARNING SIGNAL TO SAID CONTROL MEANS, THE TIME DELAY OF SAID RELAY BEING SET TO ACTUATE SAID WARNING SIGNAL WHEN THE SUPPLY OF CRYOGENIC LIQUID TO SAID RESERVOIR HAS BEEN DEPLETED.
Claim 2
Independent Claim
156 words
THE METHOD OF MAINTAINING THE LEVEL OF A CRYOGENIC LIQUID IN A RESERVOIR AT A SUBSTANTIALLY CONSTANT ELEVATION, SAID METHOD COMPRISING: DISPOSING A SEMICONDUCTOR DIODE IN SAID LIQUID AT THE TOP SURFACE THEREOF; CONNECTING SAID DIODE IN AN ELECTRICAL CIRCUIT INCLUDING CONTROL MEANS FOR REGULATING THE FLOW OF ADDITIONAL CRYOGENIC LIQUID INTO SAID RESERVOIR, SAID CONTROL MEANS BEING RESPONSIVE TO RESISTANCE CHANGES IN SAID DIODE WHEREBY ADDITIONAL CRYOGENIC LIQUID IS ADMITTED TO SAID RESERVOIR WHEN THE LEVEL OF THE CRYOGENIC LIQUID THEREIN DROPS TO AN ELEVATION WHERE THE SAID DIODE IS NO LONGER DISPOSED THEREIN AND ADDITIONAL CRYOGENIC LIQUID IS PREVENTED FROM ENTERING SAID RESERVOIR WHEN SAID DIODE IS DISPOSED IN SAID LIQUID IN SAID RESERVOIR; AND ELECTRICALLY CONNECTING A TIME DELAY RELAY AND A WARNING SIGNAL TO SAID CONTROL MEANS, THE TIME DELAY OF SAID RELAY BEING SET TO ACTUATE SAID WARNING SIGNAL WHEN THE SUPPLY OF CRYOGENIC LIQUID TO SAID RESERVOIR HAS BEEN DEPLETED.
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) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |