Patent US3258931A successfully refreshed from Google Patents.
US3258931A
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Method and apparatus for cooling a compartment
Assignee: Air Products and Chemicals Inc
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Filing: 1963-11-29
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Granted: 1966-07-05
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Edward J Kelly
- 👤 Alvin M Cohodas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:26
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; F25D3/102; F25D3/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF COOLING A COMPARTMENT TO BE REFRIGERATED, COMPRISING THE STEPS OF INTRODUCING INTO A CONTAINER A NORMALLY GASEOUS LIQUEFIED GAS, WITHDRAWING VAPOR FROM AN UPPER PORTION OF THE CONTAINER DURING THE INTRODUCTION STEP AND CONDUCTING THE SAME THROUGH A PASSAGEWAY INTO THE INTERIOR OF THE COMPARTMENT, DISCONTINUING THE FLOW OF VAPOR THROUGH SAID PASSAGEWAY, AND THEREAFTER WITHDRAWING LIQUEFIED GAS FROM A LOWER PORTION OF SAID CONTAINER AND CONDUCTING THE WITHDRAWN LIQUEFIED GAS THROUGH ANOTHER PASSAGEWAY INTO THE INTERIOR OF THE COMPARTMENT, THE LAST-NAMED STEP OCCURING AT LEAST IN PART AFTER THE END OF SAID INTRODUCTION STEP.
Claim 2
Independent Claim
98 words
THE METHOD OF COOLING A COMPARTMENT TO BE REFRIGERATED, COMPRISING THE STEPS OF INTRODUCING INTO A CONTAINER A NORMALLY GASEOUS LIQUEFIED GAS, WITHDRAWING VAPOR FROM AN UPPER PORTION OF THE CONTAINER DURING THE INTRODUCTION STEP AND CONDUCTING THE SAME THROUGH A PASSAGEWAY INTO THE INTERIOR OF THE COMPARTMENT, DISCONTINUING THE FLOW OF VAPOR THROUGH SAID PASSAGEWAY, AND THEREAFTER WITHDRAWING LIQUEFIED GAS FROM A LOWER PORTION OF SAID CONTAINER AND CONDUCTING THE WITHDRAWN LIQUEFIED GAS THROUGH ANOTHER PASSAGEWAY INTO THE INTERIOR OF THE COMPARTMENT, THE LAST-NAMED STEP OCCURING AT LEAST IN PART AFTER THE END OF SAID INTRODUCTION STEP.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |