US3311166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1964-07-02
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Granted: 1967-03-28
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Expires: 1984-07-02
Abstract
No abstract record available.
Inventors
- 👤 Donald L Southam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:49
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0081; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A COUNTER-CURRENT HEAT EXCHANGER COMPRISING: A CORE HAVING FLAT PARALLEL TOP AND BOTTOM WALLS AND FLAT PARALLEL SIDE WALLS, A PLURALITY OF HEAT EXCHANGER UNITS IN SAID CORE EACH OF WHICH COMPRISES: AN ELONGATED DUCT SHAPED RECTANGULAR IN TRANSVERSE CROSS-SECTION AND HAVING LAST SPACED PARALLEL TOP AND BOTTOM WALLS, ONLY ONE CORRUGATION WITHIN SAID DUCT WINDING UP AND DOWN TRANSVERSELY ACROSS THE WIDTH OF SAID DUCT INTO ENGAGEMENT WITH SAID TOP AND BOTTOM WALLS AND EXTENDING LONGITUDINALLY THE FULL LENGTH OF SAID DUCT TO PROVIDE A PLURALITY OF LONGITUDINALLY EXTENDING INTERNAL FLOW PASSAGES WITHIN SAID DUCT EACH OF WHICH IS COMPLETELY SEPARATED FROM ADJACENT FLOW PASSAGES ACROSS THE ENTIRE WIDTH OF SAID DUCT, AND A PAIR OF EXTERNAL CORRUGATIONS MOUNTED RESPECTIVELY ON THE OUTSIDE SURFACES OF SAID TOP AND BOTTOM WALLS AND EXTENDING LONGITUDINALLY A DISTANCE LESS THAN THE LENGTH OF SAID DUCT TO PROVIDE LAND AREAS AT BOTH END OF SAID DUCT ADJACENT SAID EXTERNAL CORRUGATIONS, THE LONGITUDINAL CRESTS OF SAID EXTERNAL CORRUGATIONS MOUNTED ON SAID TOP WALL BEING DIRECTLY OPPOSITE THE LONGITUDINAL CRESTS OF THE EXTERNAL CORRUGATIONS MOUNTED ON SAID BOTTOM WALL,
Claim 2
Dependent Claim
184 words
A COUNTER-CURRENT HEAT EXCHANGER COMPRISING: A CORE HAVING FLAT PARALLEL TOP AND BOTTOM WALLS AND FLAT PARALLEL SIDE WALLS, A PLURALITY OF HEAT EXCHANGER UNITS IN SAID CORE EACH OF WHICH COMPRISES: AN ELONGATED DUCT SHAPED RECTANGULAR IN TRANSVERSE CROSS-SECTION AND HAVING LAST SPACED PARALLEL TOP AND BOTTOM WALLS, ONLY ONE CORRUGATION WITHIN SAID DUCT WINDING UP AND DOWN TRANSVERSELY ACROSS THE WIDTH OF SAID DUCT INTO ENGAGEMENT WITH SAID TOP AND BOTTOM WALLS AND EXTENDING LONGITUDINALLY THE FULL LENGTH OF SAID DUCT TO PROVIDE A PLURALITY OF LONGITUDINALLY EXTENDING INTERNAL FLOW PASSAGES WITHIN SAID DUCT EACH OF WHICH IS COMPLETELY SEPARATED FROM ADJACENT FLOW PASSAGES ACROSS THE ENTIRE WIDTH OF SAID DUCT, AND A PAIR OF EXTERNAL CORRUGATIONS MOUNTED RESPECTIVELY ON THE OUTSIDE SURFACES OF SAID TOP AND BOTTOM WALLS AND EXTENDING LONGITUDINALLY A DISTANCE LESS THAN THE LENGTH OF SAID DUCT TO PROVIDE LAND AREAS AT BOTH END OF SAID DUCT ADJACENT SAID EXTERNAL CORRUGATIONS, THE LONGITUDINAL CRESTS OF SAID EXTERNAL CORRUGATIONS MOUNTED ON SAID TOP WALL BEING DIRECTLY OPPOSITE THE LONGITUDINAL CRESTS OF THE EXTERNAL CORRUGATIONS MOUNTED ON SAID BOTTOM WALL,
References Cited (Backward Citations)
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Cited
US2576213A
Cited
US2566310A
Cited
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Cited
GB818603A
Cited
US3165152A
Cited
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |