US2746241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-gas reciprocating engine
Assignee: Hartford National Bank and Trust Co
•
Filing: 1952-04-17
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Granted: 1956-05-22
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Expires: 1972-04-17
Abstract
No abstract record available.
Inventors
- 👤 Dros Albert August
- 👤 Yzer Jacobus Albertus Louisa
- 👤 Hellingman Evert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:13
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/045; F02G1/05; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US270036A
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US826313A
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US822463A
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US987938A
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US2345950A
Cited
GB579954A
Cited
US2611234A
Cited
US2558495A
Cited
US2616243A
Cited
US2616244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |