Patent US2238087A successfully refreshed from Google Patents.
US2238087A
Expired / Lapsed
US
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Piston
Assignee: STERLING Corp
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Filing: 1938-05-16
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Granted: 1941-04-15
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Expires: 1958-05-16
Abstract
No abstract record available.
Inventors
- 👤 Percy L Bowser
- 👤 William M Venner
- 👤 Jr Percy L Bowser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:13
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F02F3/04; F02F3/042; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448
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) | 1944-04-14 | 1944-10-14 | 1945-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-14 | 1948-10-14 | 1949-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-14 | 1952-10-14 | 1953-04-15 | $7700.00 | Window Closed / Lapsed |