Patent US3512455A successfully refreshed from Google Patents.
US3512455A
Expired / Lapsed
US
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Indexing piston for an internal combustion engine
Assignee: Sulzer AG
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Filing: 1968-10-25
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Granted: 1970-05-19
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Expires: 1988-10-25
Abstract
No abstract record available.
Inventors
- 👤 Hermann Obermeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:45
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US634654A
Cited
US1670549A
Cited
US2096562A
Cited
US2819936A
Cited
GB794282A
Cited
US2902987A
Cited
GB940690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |