US3006376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control valve for water softeners or conditioners
Assignee: Culligan Inc
•
Filing: 1958-04-28
•
Granted: 1961-10-31
•
Expires: 1978-04-28
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
2026-11-08 14:23
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879; Y10T137/86895; Y10T137/86928; Y10T137/87016; Y10T137/877; Y10T137/87708; Y10T137/87764
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2620299A
Cited
US2670328A
Cited
US2800143A
Cited
US2825363A
Cited
US2907462A
Cited
US2906332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |