US2218682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine lock valve
Assignee: Individual
•
Filing: 1937-12-23
•
Granted: 1940-10-22
•
Expires: 1957-12-23
Abstract
No abstract record available.
Inventors
- 👤 Medson George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:30
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2546; Y10T137/6851; Y10T137/6855; Y10T137/6881; Y10T137/6888; Y10T137/7069; Y10T137/7256
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) | 1943-10-22 | 1944-04-22 | 1944-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-22 | 1948-04-22 | 1948-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-22 | 1952-04-22 | 1952-10-22 | $7700.00 | Window Closed / Lapsed |