US3111168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers
Assignee: Individual
•
Filing: 1955-11-14
•
Granted: 1963-11-19
•
Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:19
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F1/00; F28F1/10; F28F1/12; F28F1/14; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/442; Y10S165/452
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A TUBULAR HEAT EXCHANGER COMPRISING A BANK OF TUBES DISPOSED WITH THEIR LONGITUDINAL AXES SUBSTANTIALLY PARALLEL AND AT RIGHT ANGLES TO THE PRINCIPAL DIRECTION OF FLOW OF THE EXTERNAL HEAT EXCHANGE MEDIUM THROUGH THE EXCHANGER, SAID BANK OF TUBES INCLUDING A PLURALITY OF PLAIN TUBES HAVING CYLINDRICAL SURFACES AND A PLURALITY OF SECOND TUBES HAVING LONGITUDINAL FINS EXTENDING FROM THEIR OUTER SURFACES, A PLAIN TUBE BEING DISPOSED ADJACENT EACH FINNED TUBE AND EACH FIN OF EACH FINNED TUBE EXTENDING IN A PLANE DIFFERENT FROM THE PLANE PASSING THROUGH THE CENTER OF THE IMMEDIATELY ADJACENT PLAIN TUBE AND EACH FIN BEING DISPOSED OBLIQUELY WITH RESPECT TO THE PRINCIPAL DIRECTION OF FLOW OF THE EXTERNAL HEAT EXCHANGE MEDIUM TO DEFINE A FLOW PATH BETWEEN EACH FINNED TUBE AND ITS ADJACENT PLAIN TUBE, THE ENDS OF SAID FINS BEING SUBSTANTIALLY SPACED FROM THE SURFACES OF SAID PLAIN TUBES AND
Claim 2
Dependent Claim
146 words
A TUBULAR HEAT EXCHANGER COMPRISING A BANK OF TUBES DISPOSED WITH THEIR LONGITUDINAL AXES SUBSTANTIALLY PARALLEL AND AT RIGHT ANGLES TO THE PRINCIPAL DIRECTION OF FLOW OF THE EXTERNAL HEAT EXCHANGE MEDIUM THROUGH THE EXCHANGER, SAID BANK OF TUBES INCLUDING A PLURALITY OF PLAIN TUBES HAVING CYLINDRICAL SURFACES AND A PLURALITY OF SECOND TUBES HAVING LONGITUDINAL FINS EXTENDING FROM THEIR OUTER SURFACES, A PLAIN TUBE BEING DISPOSED ADJACENT EACH FINNED TUBE AND EACH FIN OF EACH FINNED TUBE EXTENDING IN A PLANE DIFFERENT FROM THE PLANE PASSING THROUGH THE CENTER OF THE IMMEDIATELY ADJACENT PLAIN TUBE AND EACH FIN BEING DISPOSED OBLIQUELY WITH RESPECT TO THE PRINCIPAL DIRECTION OF FLOW OF THE EXTERNAL HEAT EXCHANGE MEDIUM TO DEFINE A FLOW PATH BETWEEN EACH FINNED TUBE AND ITS ADJACENT PLAIN TUBE, THE ENDS OF SAID FINS BEING SUBSTANTIALLY SPACED FROM THE SURFACES OF SAID PLAIN TUBES AND
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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) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |