Patent US2657553A successfully refreshed from Google Patents.
US2657553A
Expired / Lapsed
US
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Self-driving device for transporting heat from a lower to a higher temperature level
Assignee: Hartford National Bank and Trust Co
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Filing: 1951-10-03
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Granted: 1953-11-03
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Expires: 1971-10-03
Abstract
No abstract record available.
Inventors
- 👤 Jonkers Cornelius Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:49
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G2243/00; F02G2243/30; F02G2270/00; F02G2270/85
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |