Patent US2737730A successfully refreshed from Google Patents.
US3097504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling systems for aircraft
Assignee: Normalair Ltd
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Filing: 1960-10-24
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Granted: 1963-07-16
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Expires: 1980-10-24
Abstract
No abstract record available.
Inventors
- 👤 Desmond F J Quick
- 👤 Donald J Leech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:30
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D2013/0603; B64D2013/0651; B64D2013/0662; B64D2013/0674; F; F25; F25B; F25B9/00; F25B9/002; F25B9/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN AN AIRCRAFT OF THE HIGH ALTITUDE SUPERSONIC TYPE HAVING AN ENGINE COMPRESSOR, A SYSTEM FOR COOLING AIR IN AN ENCLOSURE THEREOF COMPRISING, IN COMBINATION, A SUPPLY CONDUIT, SAID SUPPLY CONDUIT CONNECTIBLE WITH AN INTERMEDIATE STAGE OF THE ENGINE COMPRESSOR SUPPLYING BLEED AIR, A HEAT EXCHANGER, THE SUPPLY CONDUIT CONNECTED TO THE HEAT EXCHANGER WHEREBY AIR IS COOLED BY SAID HEAT EXCHANGER, A CONDUIT CONNECTING THE OUTPUTOF THE HEAT EXCHANGER WITH THE ENCLOSURE, A CLOSED REFRIGERANT VAPOR CYCLE COOLANT CIRCUIT INCLUDING AN EXAPORATOR, COMPRESSOR, CONDENSER AND EXPANSION, VALVE, SAID HEAT EXCHANGER COMPRISING THE EVAPORATOR AND A REVERSED BOOTSTRAP MEANS INCLUDING A TURBINE COMPRESSOR UNIT DRIVEN BY RAM AIR FOR COOLING THE REFRIGERANT PASSING THROUGH THE CONDENSER.
Claim 2
Dependent Claim
116 words
IN AN AIRCRAFT OF THE HIGH ALTITUDE SUPERSONIC TYPE HAVING AN ENGINE COMPRESSOR, A SYSTEM FOR COOLING AIR IN AN ENCLOSURE THEREOF COMPRISING, IN COMBINATION, A SUPPLY CONDUIT, SAID SUPPLY CONDUIT CONNECTIBLE WITH AN INTERMEDIATE STAGE OF THE ENGINE COMPRESSOR SUPPLYING BLEED AIR, A HEAT EXCHANGER, THE SUPPLY CONDUIT CONNECTED TO THE HEAT EXCHANGER WHEREBY AIR IS COOLED BY SAID HEAT EXCHANGER, A CONDUIT CONNECTING THE OUTPUTOF THE HEAT EXCHANGER WITH THE ENCLOSURE, A CLOSED REFRIGERANT VAPOR CYCLE COOLANT CIRCUIT INCLUDING AN EXAPORATOR, COMPRESSOR, CONDENSER AND EXPANSION, VALVE, SAID HEAT EXCHANGER COMPRISING THE EVAPORATOR AND A REVERSED BOOTSTRAP MEANS INCLUDING A TURBINE COMPRESSOR UNIT DRIVEN BY RAM AIR FOR COOLING THE REFRIGERANT PASSING THROUGH THE CONDENSER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |