US3446233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves for centrifugal pumps
Assignee: Werner and Pfleiderer GmbH
•
Filing: 1966-11-15
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Granted: 1969-05-27
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Expires: 1986-11-15
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Hans Herold
- 👤 Gustav Ernst Rubi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:21
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0005; F04D15/0011; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668; Y10T137/2688; Y10T137/269; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7867; Y10T137/8593; Y10T137/86493; Y10T137/86509; Y10T137/86517; Y10T137/87265; Y10T137/87378; Y10T137/87394; Y10T137/87539
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |