US3450265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating water treatment and control system
Assignee: Culligan Inc
•
Filing: 1967-05-11
•
Granted: 1969-06-17
•
Expires: 1987-05-11
Abstract
No abstract record available.
Inventors
- 👤 Edward G Kreusch
- 👤 Edwin A Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:18
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; Y; Y10; Y10S; Y10S261/00; Y10S261/11; Y10S261/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1971338A
Cited
US2054798A
Cited
US2359991A
Cited
US2433167A
Cited
US2502349A
Cited
US3258422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |