Patent US2038404A successfully refreshed from Google Patents.
US2038404A
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US
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Engine piston
Assignee: Individual
•
Filing: 1934-09-06
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Granted: 1936-04-21
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Expires: 1954-09-06
Abstract
No abstract record available.
Inventors
- 👤 Lee M Atwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:06
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/14; F16J1/16; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/95; Y10S411/951
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) | 1939-04-21 | 1939-10-21 | 1940-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-21 | 1943-10-21 | 1944-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-21 | 1947-10-21 | 1948-04-21 | $7700.00 | Window Closed / Lapsed |