US2494896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston expander
Assignee: SKF Automotive Products Inc
•
Filing: 1946-12-20
•
Granted: 1950-01-17
•
Expires: 1966-12-20
Abstract
No abstract record available.
Inventors
- 👤 Arden J Mummert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:14
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/04; F16J1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1410517A
Cited
AT107138B
Cited
US1746515A
Cited
US1767711A
Cited
US1956454A
Cited
FR794121A
Cited
US2256564A
Cited
US2448932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |