Patent US3315490A successfully refreshed from Google Patents.
US3315490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic refrigerator
Assignee: Raytheon Co
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Filing: 1965-04-13
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Granted: 1967-04-25
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Expires: 1985-04-13
Abstract
No abstract record available.
Inventors
- 👤 Robert L Berry
- 👤 Kenneth W Cowans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0276; F25B; F25B9/00; F25B9/14; F25J2290/00; F25J2290/42; Y; Y10; Y10S; Y10S62/00; Y10S62/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A DEVICE FOR COOLING A HEAT LOAD COMPRISING: A FIRST REFRIGERATION CIRCUIT INCLUDING A REFRIGERATOR HAVING A CYLIN DER AND PISTON MEANS FORMING A REFRIGERATION STAGE EXPANSION CHAMBER AND VALVE MEANS COUPLED TO FEED AND EXHAUST COMPRESSED GAS TO AND FROM SAID EXPANSION CHAMBER; AND A SECOND REFRIGERATION CIRCUIT TO RECEIVE COMPRESSED GAS AND INCLUDING A HEAT EXCHANGER MEANS THERMALLY COUPLED TO THE REFRIGERATOR, AND A JOULE-THOMSON LIQUEFIER COUPLED TO RECEIVE A FLOW OF COMPRESSED GAS FROM SAID HEAT EXCHANGER MEANS, SAID HEAT EXCHANGER MEANS TRANSFERRING HEAT FROM THE COMPRESSED GAS CONTAINED THEREIN TO SAID REFRIGERATOR STAGE TO COOL THE COMPRESSED GAS FLOWING TO THE JOULE-THOMSON LIQUEFIER WHEREBY THE JOULETHOMSON LIQUEFIER EXPANDS AND FURTHER COOLS THE RECEIVED
Claim 2
Independent Claim
117 words
A DEVICE FOR COOLING A HEAT LOAD COMPRISING: A FIRST REFRIGERATION CIRCUIT INCLUDING A REFRIGERATOR HAVING A CYLIN DER AND PISTON MEANS FORMING A REFRIGERATION STAGE EXPANSION CHAMBER AND VALVE MEANS COUPLED TO FEED AND EXHAUST COMPRESSED GAS TO AND FROM SAID EXPANSION CHAMBER; AND A SECOND REFRIGERATION CIRCUIT TO RECEIVE COMPRESSED GAS AND INCLUDING A HEAT EXCHANGER MEANS THERMALLY COUPLED TO THE REFRIGERATOR, AND A JOULE-THOMSON LIQUEFIER COUPLED TO RECEIVE A FLOW OF COMPRESSED GAS FROM SAID HEAT EXCHANGER MEANS, SAID HEAT EXCHANGER MEANS TRANSFERRING HEAT FROM THE COMPRESSED GAS CONTAINED THEREIN TO SAID REFRIGERATOR STAGE TO COOL THE COMPRESSED GAS FLOWING TO THE JOULE-THOMSON LIQUEFIER WHEREBY THE JOULETHOMSON LIQUEFIER EXPANDS AND FURTHER COOLS THE RECEIVED
References Cited (Backward Citations)
US3091092A
Cited
US3115015A
Cited
US3128605A
Cited
US3183662A
Cited
US3221509A
Cited
US3125863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |