US2551478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharged two-cycle engine with retarded firing
Assignee: CHARLES W BALL
•
Filing: 1948-09-22
•
Granted: 1951-05-01
•
Expires: 1968-09-22
Abstract
No abstract record available.
Inventors
- 👤 Beverly T Wagers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:26
CPC Classifications
F; F02; F02B; F02B25/00; F02B2700/00; F02B2700/03; F02B2700/034; F02B2720/00; F02B2720/13; F02B2720/133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1079578A
Cited
US1305894A
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US1313578A
Cited
US1054080A
Cited
US1119432A
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US1821662A
Cited
GB455432A
Cited
US2383565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |