Patent US3469393A successfully refreshed from Google Patents.
US3469393A
Expired / Lapsed
US
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Turbocharged internal combustion engine
Assignee: Sir WG Armstrong Whitworth and Co Ltd
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Filing: 1967-03-06
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Granted: 1969-09-30
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Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 Donald Wilfred Tryhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:52
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/02; F02B33/00; F02B33/44; F02B37/007; F02B37/04; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N13/107; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B33/32; F02B33/34; F02B37/004; F02B39/00; F02B39/02; F02B39/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |