US2445887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve and vibrating flow indicator
Assignee: Stewart Warner Corp
•
Filing: 1941-12-11
•
Granted: 1948-07-27
•
Expires: 1961-12-11
Abstract
No abstract record available.
Inventors
- 👤 George H Palm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:37
CPC Classifications
F; F16; F16N; F16N5/00; F16N5/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7834; Y10T137/7837; Y10T137/7904; Y10T137/7905; Y10T137/8158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |