Patent US3274672A successfully refreshed from Google Patents.
US3274672A
Expired / Lapsed
US
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Method of making a heat exchanger
Assignee: Alstom Power Inc
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Filing: 1963-06-04
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Granted: 1966-09-27
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Expires: 1983-06-04
Abstract
No abstract record available.
Inventors
- 👤 Dore Franklyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:36
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0031; F28D9/0037; F28F; F28F9/00; F28F9/001; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
THE METHOD OF FORMING A PLATE TYPE HEAT EXCHANGER WHICH COMPRISES THE STEPS OF FORMING A MULTIPLICITY OF PLAIN SIDED RECTANGULAR ELEMENT SHEETS TO INCLUDE FLANGED EDGES BETWEEN RECESSED CORNERS, WELDING PAIRS OF SHEETS TOGETHER ALONG ONE PAIR OF PARALLEL FLANGED EDGES TO PROVIDE A SERIES OF OPEN-ENDED ENVELOPES, ASSEMBLING THE ENVELOPES TOGETHER WITH THEIR PLANE SIDES IN MUTUALLY ADJACENT RELATIONSHIP AND THEIR OPEN ENDS SIMILARLY DISPOSED AT OPPOSITE SIDES OF THE ASSEMBLY, WELDING THE OPEN ENDS OF THE ENVELOPE ASSEMBLIES AT THEIR FLANGED EDGES TO OTHER FLANGED EDGES ADJACENT THERETO TO CONNECT THE ENVELOPES INTO AN INTEGRAL ASSEMBLY, FORMING SEALING BARS WITH A SURFACE CONFORMING TO THE RECESSED CORNERS OF THE ASSEMBLED ENVELOPES, FITTING THE SEALING BARS TO THE RECESSED CORNERS, INSERTING THE ENVELOPE ASSEMBLY INCLUDING SEALING BARS INTO A CASING, AND DRAWING THE CASING TIGHTLY AROUND SAID ASSEMBLY TO FORCE A SEALING RELATIONSHIP BETWEEN THE SEALING BARS AND THE CONFORMING EDGES OF THE RECESSED CORNERS.
Claim 2
Independent Claim
157 words
THE METHOD OF FORMING A PLATE TYPE HEAT EXCHANGER WHICH COMPRISES THE STEPS OF FORMING A MULTIPLICITY OF PLAIN SIDED RECTANGULAR ELEMENT SHEETS TO INCLUDE FLANGED EDGES BETWEEN RECESSED CORNERS, WELDING PAIRS OF SHEETS TOGETHER ALONG ONE PAIR OF PARALLEL FLANGED EDGES TO PROVIDE A SERIES OF OPEN-ENDED ENVELOPES, ASSEMBLING THE ENVELOPES TOGETHER WITH THEIR PLANE SIDES IN MUTUALLY ADJACENT RELATIONSHIP AND THEIR OPEN ENDS SIMILARLY DISPOSED AT OPPOSITE SIDES OF THE ASSEMBLY, WELDING THE OPEN ENDS OF THE ENVELOPE ASSEMBLIES AT THEIR FLANGED EDGES TO OTHER FLANGED EDGES ADJACENT THERETO TO CONNECT THE ENVELOPES INTO AN INTEGRAL ASSEMBLY, FORMING SEALING BARS WITH A SURFACE CONFORMING TO THE RECESSED CORNERS OF THE ASSEMBLED ENVELOPES, FITTING THE SEALING BARS TO THE RECESSED CORNERS, INSERTING THE ENVELOPE ASSEMBLY INCLUDING SEALING BARS INTO A CASING, AND DRAWING THE CASING TIGHTLY AROUND SAID ASSEMBLY TO FORCE A SEALING RELATIONSHIP BETWEEN THE SEALING BARS AND THE CONFORMING EDGES OF THE RECESSED CORNERS.
References Cited (Backward Citations)
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |