Patent US3228465A successfully refreshed from Google Patents.
US3228465A
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Heat exchanger
Assignee: Societe Grenobloise dEtudes et dApplications Hydrauliques SA SOGREAH
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Filing: 1961-02-08
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Granted: 1966-01-11
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Expires: 1981-02-08
Abstract
No abstract record available.
Inventors
- 👤 Vadot Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:33
CPC Classifications
A; A24; A24F; A24F15/00; A24F15/02; A24F15/08; A24F15/10; A61; A61M; A61M19/00; A61M5/00; A61M5/44; B; B60; B60N; B60N3/00; B60N3/12; F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; A61M2205/00; A61M2205/36; A61M2205/3606; A61M2205/366
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A HEAT EXCHANGER COMPOSED OF A PLURALITY OF FLAT HEAT EXCHANGER PLATES AND A PLURALITY OF FLAT SEAL PLATES ARRANGED IN ALTERNATE RELATION IN STACK FORM WITH THE OPPOSED FACING SURFACE PORTIONS THEREOF IN ENGAGEMENT WITH EACH OTHER, EACH OF SAID PLATES HAVING FOUR FLOW HOLES, TWO OF SAID FLOW HOLES BEING DIAGONALLY SPACED AND FORMING PORTIONS OF FEEDING AND RETURN CONDUITS FOR THE PASSAGE STRAIGHT THROUGH THE EXCHANGER OF ONE LIQUID TO BE HEAT TREATED AND TWO OF SAID FLOW HOLES BEING DIAGONALLY SPACED AND FORMING PORTIONS OF FEEDING AND RETURN CONDUITS FOR THE PASAGE STRAIGHT THROUGH THE EXCHANGER OF ANOTHER TREATING LIQUID, SAID HEAT EXCHANGER PLATES BEING SOLID IN THE CENTRAL AREAS THEREOF AND SAID SEAL PLATES EACH DEFINING AN INNER CENTRAL OPENING OF SUBSTANTIAL AREA EXTENDING TO AND CONNECTING ONE OF PAIR OF THE DIAGONALLY OPPOSITE FLOW HOLES THEREOF AND EXTENDING BETWEEN THE OTHER TWO DIAGONALLY OPPOSITE FLOW HOLES THEREOF SO THAT EACH SEAL PLATE AND THE TWO ADJACENT HEAT EXCHANGER PLATES IN ENGAGEMENT
Claim 2
Dependent Claim
167 words
A HEAT EXCHANGER COMPOSED OF A PLURALITY OF FLAT HEAT EXCHANGER PLATES AND A PLURALITY OF FLAT SEAL PLATES ARRANGED IN ALTERNATE RELATION IN STACK FORM WITH THE OPPOSED FACING SURFACE PORTIONS THEREOF IN ENGAGEMENT WITH EACH OTHER, EACH OF SAID PLATES HAVING FOUR FLOW HOLES, TWO OF SAID FLOW HOLES BEING DIAGONALLY SPACED AND FORMING PORTIONS OF FEEDING AND RETURN CONDUITS FOR THE PASSAGE STRAIGHT THROUGH THE EXCHANGER OF ONE LIQUID TO BE HEAT TREATED AND TWO OF SAID FLOW HOLES BEING DIAGONALLY SPACED AND FORMING PORTIONS OF FEEDING AND RETURN CONDUITS FOR THE PASAGE STRAIGHT THROUGH THE EXCHANGER OF ANOTHER TREATING LIQUID, SAID HEAT EXCHANGER PLATES BEING SOLID IN THE CENTRAL AREAS THEREOF AND SAID SEAL PLATES EACH DEFINING AN INNER CENTRAL OPENING OF SUBSTANTIAL AREA EXTENDING TO AND CONNECTING ONE OF PAIR OF THE DIAGONALLY OPPOSITE FLOW HOLES THEREOF AND EXTENDING BETWEEN THE OTHER TWO DIAGONALLY OPPOSITE FLOW HOLES THEREOF SO THAT EACH SEAL PLATE AND THE TWO ADJACENT HEAT EXCHANGER PLATES IN ENGAGEMENT
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |