Patent US2823650A successfully refreshed from Google Patents.
US2823650A
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US
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Method and means for heat exchange between flowing media, preferably for remote heating systems
Assignee: Svenska Maskinverken AB
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Filing: 1952-02-04
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Granted: 1958-02-18
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Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Tore J Hedback
- 👤 Gustaf G Lundman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:16
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/32; F22D1/325; F01; F01K; F01K3/00; F01K3/18; F01K3/181
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA465918A
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US1612854A
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US1833130A
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US1937335A
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US1992251A
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US2026341A
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US2320911A
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US2623506A
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GB575509A
Cited
GB629298A
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US2635587A
Cited
US2586998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |