Patent US2478294A successfully refreshed from Google Patents.
US2478294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pistons for combustion, steam, and other engines
Assignee: Individual
•
Filing: 1945-10-22
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Granted: 1949-08-09
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Expires: 1965-10-22
Abstract
No abstract record available.
Inventors
- 👤 Madsen Tage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:54
CPC Classifications
F; F16; F16J; F16J9/00; F02; F02F; F02F3/00; F02F3/0015; F02F3/0023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US876853A
Cited
US1014782A
Cited
US1428552A
Cited
US1686357A
Cited
GB204844A
Cited
US1825163A
Cited
US2069437A
Cited
US2145029A
Cited
GB498455A
Cited
US2266192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |