US2939441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination two cycle internal combustion engine and turbine
Assignee: LUTTRELL ENGINEERING CORP
•
Filing: 1958-03-03
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Granted: 1960-06-07
•
Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Earl B Luttrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:49
CPC Classifications
F; F02; F02B; F02B41/00; F02B41/02; F02B41/10; F02B33/00; F02B33/02; F02B33/06; F02B33/22; F02B37/00; F02B37/04; F02B37/10; F02B37/105; F02M; F02M69/00; F02B2720/00; F02B2720/15; F02B2720/153; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1609792A
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US1793975A
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US2047167A
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US2097883A
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US2303794A
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US2296268A
Cited
US2901885A
Cited
US2570101A
Cited
US2594845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |