US2352898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine breather valve
Assignee: Wright Aeronautical Corp
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Filing: 1941-03-07
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Granted: 1944-07-04
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Expires: 1961-03-07
Abstract
No abstract record available.
Inventors
- 👤 Henry C Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:07
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/0011; F16; F16K; F16K7/00; F01M11/00; F01M11/06; F16N; F16N2210/00; F16N2210/08; F16N2210/09; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0874; Y10T137/0923; Y10T137/0947
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) | 1947-07-04 | 1948-01-03 | 1948-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-04 | 1952-01-03 | 1952-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-04 | 1956-01-03 | 1956-07-04 | $7700.00 | Window Closed / Lapsed |