Patent US4520268A successfully refreshed from Google Patents.
Patent US2607190A successfully refreshed from Google Patents.
US2607190A
Expired / Lapsed
US
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Hot gas reciprocating engine with working medium augmenting means
Assignee: Hartford National Bank and Trust Co
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Filing: 1949-06-21
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Granted: 1952-08-19
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Expires: 1969-06-21
Abstract
No abstract record available.
Inventors
- 👤 Kohler Jacob Willem Laurens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:11
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/045; F02G1/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US855442A
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US815732A
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US1091904A
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US1764110A
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US2042969A
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US2089224A
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US2185940A
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US2547781A
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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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |