US3195322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerator employing helium
Assignee: United Kingdom Atomic Energy Authority
•
Filing: 1962-09-17
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Granted: 1965-07-20
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Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 London Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/12; Y; Y10; Y10S; Y10S62/00; Y10S62/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A REFRIGERATOR HAVING LIQUID HELIUM 3 AS ITS WORKING FLUID AND COMPRISING A WORKING CHAMBER, A BOILER, A CONDENSER, CONDUIT MEANS TO PROVIDE A SUPERFICIAL HELIUM 4 LINK BETWEEN SAID WORKING CHAMBER AND SAID BOILER MEANS TO PASS LIQUID HELIUM 3 TO THE WORKING CHAMBER TO MIX THEREIN WITH SUPERFLUID HELIUM 4 WHEREBY HEAT IS EXTRACTED, AND HEATING MEANS ASSOCIATED WITH SAID BOILER
Claim 2
Dependent Claim
63 words
A REFRIGERATOR HAVING LIQUID HELIUM 3 AS ITS WORKING FLUID AND COMPRISING A WORKING CHAMBER, A BOILER, A CONDENSER, CONDUIT MEANS TO PROVIDE A SUPERFICIAL HELIUM 4 LINK BETWEEN SAID WORKING CHAMBER AND SAID BOILER MEANS TO PASS LIQUID HELIUM 3 TO THE WORKING CHAMBER TO MIX THEREIN WITH SUPERFLUID HELIUM 4 WHEREBY HEAT IS EXTRACTED, AND HEATING MEANS ASSOCIATED WITH SAID BOILER
References Cited (Backward Citations)
US3004394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |