Patent US2823085A successfully refreshed from Google Patents.
US2823085A
Expired / Lapsed
US
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Piston for internal combustion engines
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1955-01-24
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Granted: 1958-02-11
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Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Keylwert Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:55
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/14; F16J1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1320428A
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US2069594A
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US2362158A
Cited
US2379359A
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US2694607A
Cited
US2563371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |