US2755151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston structure
Assignee: Individual
•
Filing: 1952-05-29
•
Granted: 1956-07-17
•
Expires: 1972-05-29
Abstract
No abstract record available.
Inventors
- 👤 Daub Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:03
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR455539A
Cited
GB251127A
Cited
US2148423A
Cited
US2255006A
Cited
US2244954A
Cited
US2278958A
Cited
GB548400A
Cited
FR897373A
Cited
GB642042A
Cited
US2550879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |