Patent US2765152A successfully refreshed from Google Patents.
US2765152A
Expired / Lapsed
US
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Extended surface heat exchanger
Assignee: Svenska Maskinverken AB
•
Filing: 1953-11-03
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Granted: 1956-10-02
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Expires: 1973-11-03
Abstract
No abstract record available.
Inventors
- 👤 Hagby Gustav Vilhelm
- 👤 Jonsson Sven Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:49
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/124; B; B21; B21D; B21D53/00; B21D53/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2337294A
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US2566318A
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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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |