Patent US2380907A successfully refreshed from Google Patents.
US2380907A
Expired / Lapsed
US
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Piston for internal-combustion engines
Assignee: STANLEY KONASZEWSKI
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Filing: 1944-02-15
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Granted: 1945-07-31
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Expires: 1964-02-15
Abstract
No abstract record available.
Inventors
- 👤 Roy M Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:55
CPC Classifications
F; F02; F02F; F02F3/00; F16; F16J; F16J1/00; F16J1/08; F16J1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-07-30 | 1949-01-29 | 1949-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-30 | 1953-01-29 | 1953-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-30 | 1957-01-29 | 1957-07-31 | $7700.00 | Window Closed / Lapsed |