US3307370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling device for helium
Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV
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Filing: 1965-08-06
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Granted: 1967-03-07
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Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 Klipping Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:04
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/02; F17C13/028; F17C2221/00; F17C2221/01; F17C2221/016; F17C2221/017; F17C2221/03; F17C2221/038; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2227/00; F17C2227/01; F17C2227/0128; F17C2227/0135; F17C2227/0157
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A CRYOGENIC GAS REFRIGERATOR SYSTEM USING A REFRIGERANT, COMPRISING, IN COMBINATION: A COMPRESSOR; LIQUIFIER MEANS CONNECTED TO SAID COMPRESSOR FOR LIQUEFYING A REFRIGERANT; A CONTINUOUS FLOW CRYOSTAT CONNECTED TO SAID LIQUEFIER MEANS FOR PRODUCING CONTROLLABLE LOW TEMPERATURES BY EVAPORATION OF THE LIQUID REFRIGERANT; FIRST THERMOSTATICALLY CONTROLLED VALVE MEANS FOR REGULATING THE FLOW OF THE LIQUEFIED REFRIGERANT BETWEEN SAID LIQUEFIER MEANS AND SAID CONTINUOUS FLOW CRYOSTAT IN RESPONSE TO THE TEMPERATURE AT A POINT WITHIN SAID CRYOSTAT; A VACUUM PUMP CONNECTED BETWEEN SAID CONTINUOUS FLOW CRYOSTAT AND SAID COMPRESSOR FOR PUMPING THE GAS FROM SAID CRYOSTAT TO SAID COMPRESSOR; AND SECOND THERMOSTATICALLY CONTROLLED VALVE MEANS FOR REGULATING THE FLOW OF THE GAS BETWEEN SAID CONTINUOUS FLOW CRYOSTAT AND SAID VACUUM PUMP IN RESPONSE TO THE TEMPERATURE AT A POINT WITHIN SAID CRYOSTAT.
Claim 2
Dependent Claim
131 words
A CRYOGENIC GAS REFRIGERATOR SYSTEM USING A REFRIGERANT, COMPRISING, IN COMBINATION: A COMPRESSOR; LIQUIFIER MEANS CONNECTED TO SAID COMPRESSOR FOR LIQUEFYING A REFRIGERANT; A CONTINUOUS FLOW CRYOSTAT CONNECTED TO SAID LIQUEFIER MEANS FOR PRODUCING CONTROLLABLE LOW TEMPERATURES BY EVAPORATION OF THE LIQUID REFRIGERANT; FIRST THERMOSTATICALLY CONTROLLED VALVE MEANS FOR REGULATING THE FLOW OF THE LIQUEFIED REFRIGERANT BETWEEN SAID LIQUEFIER MEANS AND SAID CONTINUOUS FLOW CRYOSTAT IN RESPONSE TO THE TEMPERATURE AT A POINT WITHIN SAID CRYOSTAT; A VACUUM PUMP CONNECTED BETWEEN SAID CONTINUOUS FLOW CRYOSTAT AND SAID COMPRESSOR FOR PUMPING THE GAS FROM SAID CRYOSTAT TO SAID COMPRESSOR; AND SECOND THERMOSTATICALLY CONTROLLED VALVE MEANS FOR REGULATING THE FLOW OF THE GAS BETWEEN SAID CONTINUOUS FLOW CRYOSTAT AND SAID VACUUM PUMP IN RESPONSE TO THE TEMPERATURE AT A POINT WITHIN SAID CRYOSTAT.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |