US3368683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pool water treatment system
Assignee: Culligan Inc
•
Filing: 1965-04-30
•
Granted: 1968-02-13
•
Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Stanley F Rak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:00
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/8597; Y10T137/86389; Y10T137/86405; Y10T137/86421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2012406A
Cited
US2618510A
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US2529028A
Cited
US2573299A
Cited
US2659516A
Cited
US2808934A
Cited
US2865388A
Cited
US3223242A
Cited
US3073330A
Cited
US3166096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |