Patent US3025680A successfully refreshed from Google Patents.
US3025680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system
Assignee: TDK Micronas GmbH
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Filing: 1960-06-10
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Granted: 1962-03-20
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Expires: 1980-06-10
Abstract
No abstract record available.
Inventors
- 👤 Brosse Kenneth L De
- 👤 Behun Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:09
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
A COOLING SYSTEM COMPRISING; A LIQUID NITROGEN RESSERVOIR; A LIQUID NITROGEN PRESSURER CHAMBER; VALVE MEANS CONNECTING SAID RESERVOIR AND CHAMBER FOR SUPPLYING LIQUID NITROGEN THERETO; A COOLER COMPRISING A CONDUIT WITH A CLOSED END; A LIQUID NITROGEN SUPPLY CONDUIT COMMUNICATING BETWEEN SAID COOLER AND SAID CHAMBER; AND A LIQUID NITROGEN RETURN CONDUIT COMMUNICATING BETWEEN SAID COOLER AND SAID RESERVOIR PRESURE CONTROL MEANS CONNECTED TO SAID RESERVOIR AND ADAPTED TO MAINTAIN THE VAPOR PRESSURE OF SAID NITROGEN IN SAID RESERVOIR AT A LOWER PRESSURE THAN THE PRESSURE IN SAID PRESSURE CHAMBER WHEREBY LIQUID NITROGEN UNDER THE INFLUENCE OF NITROGEN GAS PRESSURE GENERATED IN SAID CHAMBER DUE TO EVAPORATION OF THE LIQUID NITROGEN THEREIN IS FORCED THROUGH SAID SUPPLY CONDUIT TO SAID COOLER AND RETURNED TO SAID RESERVOIR THROUGH SAID RETURN CONDUIT.
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) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |