Patent US2384578A successfully refreshed from Google Patents.
US3256930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Individual
•
Filing: 1960-11-22
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Granted: 1966-06-21
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Expires: 1980-11-22
Abstract
No abstract record available.
Inventors
- 👤 Norback Per Gunnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28D; F28D9/00; F28D9/0031; F28D9/0043; F28F21/00; F28F21/06; F28F21/065; F28F21/08; F28F21/088; F28F3/12; F28F2250/00; F28F2250/10; F28F2250/102; Y; Y10; Y10S; Y10S165/00; Y10S165/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A HEAT EXCHANGER FOR TWO FLUIDS NAMELY, A LIQUID AND A GAS, AND FORMED WITH ADJACENT INTERSPACES, ALTERNATE INTERFACES FORMING PASSAGES FOR LIQUID AND THE REMAINING INTERSPACES FORMING PASSAGES FOR GAS, EACH INTERSPACE BEING BOUNDED BY A PAIR OF SHEETS, THE SHEETS BOUNDING THE INTERSPACES FOR THE LIQUID PASSAGES BEING MORE PLIABLE THAN THE SHEETS BOUNDING THE GAS PASSAGES, THE SHEETS FORMING BETWEEN THE INTERSPACES PARTITIONS, EACH PARTITION COMPRISING AT LEAST TWO SHEETS, THE SHEETS OF ONE PARTITION BEING MORE PLIABLE THAN THE OTHER, THE MORE PLIABLE SHEETS BOUNDING THE LIQUID PASSAGEWAYS SO THAT THE SHEETS ON THE LIQUID SIDE OF THE PARTITIONS WILL ACCOMMODATE THEMSELVES UNDER PRESSURE TO THE SHAPE OF THE SHEETS ON THE GAS SIDE OF THE PARTITIONS, THE SHEETS ON THE GAS SIDE BEING ARRANGED IN SUCH A MANNER TO ISOLATE THE GAS FROM CONTACT WITH THE FLEXIBLE SHEETS.
Claim 2
Dependent Claim
144 words
IN A HEAT EXCHANGER FOR TWO FLUIDS NAMELY, A LIQUID AND A GAS, AND FORMED WITH ADJACENT INTERSPACES, ALTERNATE INTERFACES FORMING PASSAGES FOR LIQUID AND THE REMAINING INTERSPACES FORMING PASSAGES FOR GAS, EACH INTERSPACE BEING BOUNDED BY A PAIR OF SHEETS, THE SHEETS BOUNDING THE INTERSPACES FOR THE LIQUID PASSAGES BEING MORE PLIABLE THAN THE SHEETS BOUNDING THE GAS PASSAGES, THE SHEETS FORMING BETWEEN THE INTERSPACES PARTITIONS, EACH PARTITION COMPRISING AT LEAST TWO SHEETS, THE SHEETS OF ONE PARTITION BEING MORE PLIABLE THAN THE OTHER, THE MORE PLIABLE SHEETS BOUNDING THE LIQUID PASSAGEWAYS SO THAT THE SHEETS ON THE LIQUID SIDE OF THE PARTITIONS WILL ACCOMMODATE THEMSELVES UNDER PRESSURE TO THE SHAPE OF THE SHEETS ON THE GAS SIDE OF THE PARTITIONS, THE SHEETS ON THE GAS SIDE BEING ARRANGED IN SUCH A MANNER TO ISOLATE THE GAS FROM CONTACT WITH THE FLEXIBLE SHEETS.
References Cited (Backward Citations)
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Cited
US1823788A
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US2097851A
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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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |