Patent US2780053A successfully refreshed from Google Patents.
US2780053A
Expired / Lapsed
US
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Power units, including reciprocating internal combustion engines and turbo compressors utilizing exhaust gases from such engines
Assignee: Napier Turbochargers Ltd
•
Filing: 1952-12-15
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Granted: 1957-02-05
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Expires: 1972-12-15
Abstract
No abstract record available.
Inventors
- 👤 Cowland William Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:41
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/02; F02B37/001; F02B37/007; F02B37/013; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N13/107; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB182787A
Cited
US1895538A
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US1921906A
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US1938737A
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CH160008A
Cited
US2200744A
Cited
US2199259A
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US2306277A
Cited
US2245326A
Cited
US2296268A
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US2300977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |