US3237403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercritical cycle heat engine
Assignee: Douglas Aircraft Co Inc
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Filing: 1963-03-19
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Granted: 1966-03-01
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Expires: 1983-03-19
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Feher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:09
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/002; F25B9/008; F01; F01K; F01K7/00; F01K7/32; F25B2309/00; F25B2309/06; F25B2309/061; F25B2400/00; F25B2400/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A HEAT ENGINE COMPRISING A CIRCULATING SYSTEM CONTAINING A WORKING FLUID, THE SYSTEM INCLUDING: PRESSURIZING MEANS TO RAISE THE PRESSURE OF SAID FLUID IN LIQUID PHASE FROM A LOW CYCLE PRESSURE TO A HIGH PRESSURE; MEANS TO ADD HEAT TO SAID FLUID SUBSTANTIALLY AT SAID HIGH CYCLE PRESSURE TO RAISE IT TO ITS HIGH CYCLE TEMPERATURE SUBSTANTIALLY ABOVE ITS CRITICAL TEMPERATURE; MEANS TO EXPAND SAID FLUID THROUGH AN ENERGY CONVERTER TO DO USEFUL WORK; AND MEANS TO COOL SAID FLUID SUBSTANTIALLY BELOW ITS CRITICAL PRESSURE TO A TEMPERATURE SUBSTANTIALLY BELOW ITS CRITICAL TEMPERATURE TO RENDER IT COMPLETELY LIQUID FOR ENTRAINMENT BY SAID PRESSURIZING MEANS; THE LOW CYCLE PRESSURE IN SAID SYSTEM BEING SUBSTANTIALLY ABOVE THE CRITICAL PRESSURE OF SAID FLUID.
Claim 2
Dependent Claim
120 words
A HEAT ENGINE COMPRISING A CIRCULATING SYSTEM CONTAINING A WORKING FLUID, THE SYSTEM INCLUDING: PRESSURIZING MEANS TO RAISE THE PRESSURE OF SAID FLUID IN LIQUID PHASE FROM A LOW CYCLE PRESSURE TO A HIGH PRESSURE; MEANS TO ADD HEAT TO SAID FLUID SUBSTANTIALLY AT SAID HIGH CYCLE PRESSURE TO RAISE IT TO ITS HIGH CYCLE TEMPERATURE SUBSTANTIALLY ABOVE ITS CRITICAL TEMPERATURE; MEANS TO EXPAND SAID FLUID THROUGH AN ENERGY CONVERTER TO DO USEFUL WORK; AND MEANS TO COOL SAID FLUID SUBSTANTIALLY BELOW ITS CRITICAL PRESSURE TO A TEMPERATURE SUBSTANTIALLY BELOW ITS CRITICAL TEMPERATURE TO RENDER IT COMPLETELY LIQUID FOR ENTRAINMENT BY SAID PRESSURIZING MEANS; THE LOW CYCLE PRESSURE IN SAID SYSTEM BEING SUBSTANTIALLY ABOVE THE CRITICAL PRESSURE OF SAID FLUID.
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |