Patent US3051147A successfully refreshed from Google Patents.
US3051147A
Expired / Lapsed
US
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Exhaust means for multi-cylinder multiple piston internal combustion engines
Assignee: William Doxford and Sons Engineers Ltd
•
Filing: 1958-04-28
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Granted: 1962-08-28
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Expires: 1978-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jackson Percy
- 👤 Taylor Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:54
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL83101C
Cited
US1525971A
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US2077457A
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US2139425A
Cited
US2228473A
Cited
GB564693A
Cited
GB569270A
Cited
US2434584A
Cited
US2644295A
Cited
US2611349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |