Patent US4626897A successfully refreshed from Google Patents.
Patent US2771741A successfully refreshed from Google Patents.
US2771741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature starting of gas turbine engines
Assignee: Standard Oil Co
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Filing: 1952-05-16
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Granted: 1956-11-27
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Expires: 1972-05-16
Abstract
No abstract record available.
Inventors
- 👤 Th Daniel P Barnard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:21
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
THE METHOD OF EFFECTING STARTING AT LOW SUB-ZERO TEMPERATURES OF A GAS TURBINE AIRCRAFT ENGINE NORMALY EMPLOYING A LIQUID JET FUEL WHICH IS NOT READILY ATOMIZABLE AND INGNITABLE AT LOW SUB-ZERO TEMPERATURES, WHICH METHOD COMPRISES STORING IN A CLOSED PRESSURE ZONE SEPARATELY FROM THE JET FUEL A LIQUEFIED NORMALLY GASEOUS HYDROCARBON HAVING A VAPOR PRESSURE IN THE RANGE OF ABOUT 15 P. S. I. TO ABOUT 100 P. S. I. AT A SUB-ZERO TEMPERATURE OF ABOUT -100* F. AND INTRODUCING NORMALLY GASEOUS HYDROCARBON FROM SAID CLOSED PRESSURE ZONE INTO JET FUEL FLOWING TO THE GAS TURBINE DURING THE STARTING PERIOD, EFJECTING THE INTRODUCING OF THE NORMALLY GASEOUS HYDROCARBON INTO THE FLOWING JET FUEL BY PRESSURE DEVELOPED IN THE CLOSED ZONE AND CONTROLLING THE RATE OF INTRODUCION TO ABTAIN REDUCTION IN JET FUEL VISCOSITY AND THE PRODUCTION OF A FUEL MIXTURE WHICH IS ATOMIZABLE AND IGNITABLE AT LOW SUB-ZERO TEMPERATURES.
Claim 2
Independent Claim
149 words
THE METHOD OF EFFECTING STARTING AT LOW SUB-ZERO TEMPERATURES OF A GAS TURBINE AIRCRAFT ENGINE NORMALY EMPLOYING A LIQUID JET FUEL WHICH IS NOT READILY ATOMIZABLE AND INGNITABLE AT LOW SUB-ZERO TEMPERATURES, WHICH METHOD COMPRISES STORING IN A CLOSED PRESSURE ZONE SEPARATELY FROM THE JET FUEL A LIQUEFIED NORMALLY GASEOUS HYDROCARBON HAVING A VAPOR PRESSURE IN THE RANGE OF ABOUT 15 P. S. I. TO ABOUT 100 P. S. I. AT A SUB-ZERO TEMPERATURE OF ABOUT -100* F. AND INTRODUCING NORMALLY GASEOUS HYDROCARBON FROM SAID CLOSED PRESSURE ZONE INTO JET FUEL FLOWING TO THE GAS TURBINE DURING THE STARTING PERIOD, EFJECTING THE INTRODUCING OF THE NORMALLY GASEOUS HYDROCARBON INTO THE FLOWING JET FUEL BY PRESSURE DEVELOPED IN THE CLOSED ZONE AND CONTROLLING THE RATE OF INTRODUCION TO ABTAIN REDUCTION IN JET FUEL VISCOSITY AND THE PRODUCTION OF A FUEL MIXTURE WHICH IS ATOMIZABLE AND IGNITABLE AT LOW SUB-ZERO TEMPERATURES.
References Cited (Backward Citations)
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Cited
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US2520434A
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US2579215A
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US2688840A
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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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |