Patent US2497380A successfully refreshed from Google Patents.
US2497380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston
Assignee: Individual
•
Filing: 1945-10-05
•
Granted: 1950-02-14
•
Expires: 1965-10-05
Abstract
No abstract record available.
Inventors
- 👤 William M Venner
- 👤 Percy L Bowser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:01
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F02F3/025; 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)
US1758444A
Cited
US1927611A
Cited
US2221535A
Cited
US2240967A
Cited
US2262132A
Cited
US2240968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |