US2467635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain valve
Assignee: —
•
Filing: —
•
Granted: 1949-04-19
•
Expires: 1966-04-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:51
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; F16K15/028; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/794
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB107058A
Cited
US478489A
Cited
US973609A
Cited
US1102647A
Cited
US1493774A
Cited
US1907299A
Cited
US2136898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |