US2505756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the proportioning and control of fluid flow
Assignee: Directie van de Staatsmijnen in Limburg
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Filing: 1946-12-23
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Granted: 1950-05-02
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Expires: 1966-12-23
Abstract
No abstract record available.
Inventors
- 👤 Koning Jacob De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:05
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/03; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2504; Y10T137/2514; Y10T137/2521; Y10T137/2524; Y10T137/2931; Y10T137/3115; Y10T137/3127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2332953A
Cited
US2382853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |