US2451707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve arrangement
Assignee: Individual
•
Filing: 1944-03-14
•
Granted: 1948-10-19
•
Expires: 1964-03-14
Abstract
No abstract record available.
Inventors
- 👤 Armstrong Fullerton Geo Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:25
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16F; F16F9/00; F16F9/32; F16F9/50; F16F9/52; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7737; Y10T137/7771; Y10T137/7772; Y10T137/7774; Y10T137/7777
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2371122A
Cited
FR345050A
Cited
US1371277A
Cited
US1472412A
Cited
US1828446A
Cited
US1952683A
Cited
GB560548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |