US2760834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston structure
Assignee: Individual
•
Filing: 1952-07-28
•
Granted: 1956-08-28
•
Expires: 1972-07-28
Abstract
No abstract record available.
Inventors
- 👤 Daub Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:55
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/22; F02; F02F; F02F3/00; F02F3/02; F02F3/04; F02F3/045; F02F2200/00; F02F2200/04; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR455539A
Cited
GB251127A
Cited
US2124360A
Cited
US2301944A
Cited
GB540990A
Cited
GB557070A
Cited
FR897373A
Cited
GB581527A
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) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |