Patent US2438243A successfully refreshed from Google Patents.
US2438243A
Expired / Lapsed
US
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Internal-combustion engine piston
Assignee: Individual
•
Filing: 1944-10-20
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Granted: 1948-03-23
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Expires: 1964-10-20
Abstract
No abstract record available.
Inventors
- 👤 Stanley M Zoromskis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:30
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/02; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32861; Y10T403/32893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1020836A
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US1224999A
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US1267963A
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US1294833A
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US1389099A
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US1456727A
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FR739921A
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US2040032A
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US2221535A
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US2344416A
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US2295199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |