Patent US1904475A successfully refreshed from Google Patents.
US1904475A
Expired / Lapsed
US
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Valve control mechanism
Assignee: —
•
Filing: —
•
Granted: 1933-04-18
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Expires: 1950-04-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:10
CPC Classifications
F; F16; F16K; F16K17/00; F16K7/00; F16K7/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7726; Y10T137/7758; Y10T137/7759; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/7837; Y10T137/7876; Y10T137/7904; Y10T137/7908
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) | 1936-04-17 | 1936-10-17 | 1937-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-17 | 1940-10-17 | 1941-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-17 | 1944-10-17 | 1945-04-18 | $7700.00 | Window Closed / Lapsed |