Patent US2722924A successfully refreshed from Google Patents.
US2722924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: HEDGES MOTOR Co
•
Filing: 1951-02-17
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Granted: 1955-11-08
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Expires: 1971-02-17
Abstract
No abstract record available.
Inventors
- 👤 Harry O Hedges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:55
CPC Classifications
F; F02; F02B; F02B25/00; F02B2700/00; F02B2700/03; F02B2700/034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US966972A
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US895194A
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US967250A
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US1079622A
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US1218132A
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US1301661A
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US1513190A
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US1688767A
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US1805670A
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US1871820A
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US2426613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |