US3071187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Stewart Warner Corp
•
Filing: 1958-11-03
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Granted: 1963-01-01
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Expires: 1978-11-03
Abstract
No abstract record available.
Inventors
- 👤 Gordon J Fairbanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:41
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0062; B; B23; B23K; B23K1/00; B23K1/0008; B23K1/0012; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A PLATE AND RUFFLED FIN HEAT EXCHANGER COMPRISING; AT LEAST TWO STACKED RUFFLED FIN ELEMENTS, A THIN SEPARATOR PLATE SEPARATING THE STACKED RUFFLED FIN ELEMENTS AND SANDWICHED THEREBETWEEN, SPACER BARS POSITIONED LONGITUDINALLY AND AT OPPOSITE EDGES OF EACH OF SAID RUFFLED FIN ELEMENTS, SAID SPACER BARS ASSOCIATED WITH ONE OF SAID RUFFLED FIN ELEMENTS BEING TRANSVERSE TO SPACER BARS ASSOCIATED WITH SAID OTHER RUFFLED FIN ELEMENT, SAID SPACER BARS INCLUDING PORTIONS EXTENDING BEYOND THE EDGES OF SAID RUFFLED FIN ELEMENTS, EXTENSION TABS ON SAID SEPARATOR PLATE AT THE POSITIONS WHERE SAID SPACER BARS CONTACT SAID SEPARATOR PLATE, SAID EXTENSION TABS ALSO EXTENDING BEYOND THE EDGES OF SAID RUFFLED FIN ELEMENTS, MEANS FOR SECURING SOME OF SAID EXTENSION TABS AT THE OUTER END THEREOF TO THE UNDERLYING SPACER BARS, AND THE OTHERS OF SAID EXTENSION TABS AT THEIR OUTER ENDS TO THE OVERLYING SPACER BARS SUCH THAT SAID RELATIVELY NARROW TABS WILL TAKE UP ANY EXPANSION DIFFERENCES BETWEEN SAID SEPARATOR PLATES AND SAID SPACER BARS DURING SAID BRAZING OPERATION.
Claim 2
Dependent Claim
168 words
A PLATE AND RUFFLED FIN HEAT EXCHANGER COMPRISING; AT LEAST TWO STACKED RUFFLED FIN ELEMENTS, A THIN SEPARATOR PLATE SEPARATING THE STACKED RUFFLED FIN ELEMENTS AND SANDWICHED THEREBETWEEN, SPACER BARS POSITIONED LONGITUDINALLY AND AT OPPOSITE EDGES OF EACH OF SAID RUFFLED FIN ELEMENTS, SAID SPACER BARS ASSOCIATED WITH ONE OF SAID RUFFLED FIN ELEMENTS BEING TRANSVERSE TO SPACER BARS ASSOCIATED WITH SAID OTHER RUFFLED FIN ELEMENT, SAID SPACER BARS INCLUDING PORTIONS EXTENDING BEYOND THE EDGES OF SAID RUFFLED FIN ELEMENTS, EXTENSION TABS ON SAID SEPARATOR PLATE AT THE POSITIONS WHERE SAID SPACER BARS CONTACT SAID SEPARATOR PLATE, SAID EXTENSION TABS ALSO EXTENDING BEYOND THE EDGES OF SAID RUFFLED FIN ELEMENTS, MEANS FOR SECURING SOME OF SAID EXTENSION TABS AT THE OUTER END THEREOF TO THE UNDERLYING SPACER BARS, AND THE OTHERS OF SAID EXTENSION TABS AT THEIR OUTER ENDS TO THE OVERLYING SPACER BARS SUCH THAT SAID RELATIVELY NARROW TABS WILL TAKE UP ANY EXPANSION DIFFERENCES BETWEEN SAID SEPARATOR PLATES AND SAID SPACER BARS DURING SAID BRAZING OPERATION.
References Cited (Backward Citations)
US2899177A
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US2172819A
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US2368814A
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US2396522A
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US2566310A
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FR1125663A
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US2961222A
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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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |