US3452541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid air jet propulsion engine and method of operating same
Assignee: Marquardt Corp
•
Filing: 1961-02-09
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Granted: 1969-07-01
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Expires: 1981-02-09
Abstract
No abstract record available.
Inventors
- 👤 Carl H Builder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:47
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/12; F02C7/14; F02C7/141; F02C7/143; F02K; F02K7/00; F02K7/08; F17; F17C; F17C9/00; F17C9/02; F17C9/04; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A HEAT EXCHANGE APPARATUS FOR AN ENGINE WHICH UTILIZES A SOURCE OF LIQUID HYDROGEN AS A FUEL AND AS A COOLANT FOR PRODUCING LIQUID AIR USED AS AN OXIDANT COMPRISING, A PER-COOLING SECTION, A PRIMARY CONDENSER SECTION AND A SECONDARY CONDENSER SECTION HAVING AIR PASSAGES CONNECTED IN SERIES, MEANS FOR INTRODUCING HYDROGEN TO THE SECONDARY CONDENSER SECTION, MEANS FOR EXPANDING A PORTION OF THE HYDROGEN LEAVING THE SECONDARY CONDENSER SECTION TO COOL SAID PORTION SUBSTANTIALLY BELOW THE PINCH POINT FOR THE AIR OCCURING AT SUBSTANTIALLY INCIPIENT LIQUEFACTION, MEANS FOR CONNECTING THE EXPANDED HYDROGEN POR TION TO SAID PRIMARY CONDENSER SECTION FOR TAKING THE AIR THROUGH ITS PINCH POINT, MEANS FOR BYPASSING HYDROGEN FROM THE SECONDARY CONDENSER SECTION TO THE PER-COOLER SECTION, MEANS FOR CONNECTING THE HYDROGEN DISCHARGE OF THE PRIMARY CONDENSER SECTION TO EXHAUST AND TO THE PERCOOLER SECTION, AND VALVE MEANS FOR REGULATING HYDROGEN FLOW THROUGH SAID BY-PASSING MEANS AND SAID CONNECTING MEANS.
Claim 2
Dependent Claim
154 words
A HEAT EXCHANGE APPARATUS FOR AN ENGINE WHICH UTILIZES A SOURCE OF LIQUID HYDROGEN AS A FUEL AND AS A COOLANT FOR PRODUCING LIQUID AIR USED AS AN OXIDANT COMPRISING, A PER-COOLING SECTION, A PRIMARY CONDENSER SECTION AND A SECONDARY CONDENSER SECTION HAVING AIR PASSAGES CONNECTED IN SERIES, MEANS FOR INTRODUCING HYDROGEN TO THE SECONDARY CONDENSER SECTION, MEANS FOR EXPANDING A PORTION OF THE HYDROGEN LEAVING THE SECONDARY CONDENSER SECTION TO COOL SAID PORTION SUBSTANTIALLY BELOW THE PINCH POINT FOR THE AIR OCCURING AT SUBSTANTIALLY INCIPIENT LIQUEFACTION, MEANS FOR CONNECTING THE EXPANDED HYDROGEN POR TION TO SAID PRIMARY CONDENSER SECTION FOR TAKING THE AIR THROUGH ITS PINCH POINT, MEANS FOR BYPASSING HYDROGEN FROM THE SECONDARY CONDENSER SECTION TO THE PER-COOLER SECTION, MEANS FOR CONNECTING THE HYDROGEN DISCHARGE OF THE PRIMARY CONDENSER SECTION TO EXHAUST AND TO THE PERCOOLER SECTION, AND VALVE MEANS FOR REGULATING HYDROGEN FLOW THROUGH SAID BY-PASSING MEANS AND SAID CONNECTING MEANS.
References Cited (Backward Citations)
US2960834A
Cited
US3002340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |