Patent US4044194A successfully refreshed from Google Patents.
Patent US3008486A successfully refreshed from Google Patents.
US3008486A
Expired / Lapsed
US
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Directional valve for automatic water softeners or conditioners
Assignee: Culligan Inc
•
Filing: 1956-12-17
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Granted: 1961-11-14
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Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Robert E Schulze
- 👤 Edmund J Heartstedt
- 👤 Robert J Jauch
- 👤 Christian W Kruckeberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:11
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; C02F2303/00; C02F2303/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668; Y10T137/2688; Y10T137/8593; Y10T137/86389; Y10T137/86445; Y10T137/87265; Y10T137/87338; Y10T137/87362; Y10T137/8737; Y10T137/87499; Y10T137/87507
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US2596822A
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US2670328A
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US2717002A
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US2800143A
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US2825363A
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US2744867A
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US2880872A
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US2906281A
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US2869725A
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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) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |