US2469921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Glenn L Martin Co
•
Filing: 1945-03-07
•
Granted: 1949-05-10
•
Expires: 1965-03-07
Abstract
No abstract record available.
Inventors
- 👤 George F Hoge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0712; Y; Y10; Y10S; Y10S251/00; Y10S251/90; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86831; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US382469A
Cited
US432744A
Cited
US969803A
Cited
US1281712A
Cited
US1293858A
Cited
US1385019A
Cited
US2217835A
Cited
US2360733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |