US3159573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance sensing probe system
Assignee: AO Smith Corp
•
Filing: 1961-03-30
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Granted: 1964-12-01
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Expires: 1981-03-30
Abstract
No abstract record available.
Inventors
- 👤 Harold D Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:17
CPC Classifications
G; G05; G05D; G05D21/00; G05D21/02; B; B01; B01J; B01J47/00; B01J47/14; B01J49/00; B01J49/80; B01J49/85; C; C02; C02F; C02F1/00; C02F1/42; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN COMBINATION WITH A WATER SOFTENER TANK HAVING A SOFTENING RESIN AND HAVING A CONTROL VALVE AND A REGENERATION CONTROL CIRCUIT, THE IMPROVEMENT COMPRISING A WATER CONDUIT CONNECTED TO THE VALVE AND EXTENDING INWARDLY THROUGH AN OPENING IN THE TANK INTO THE RESIN, ELECTRODE MEANS INCLUDING AT LEAST THREE SEPARATE ELECTRODES DISPOSED WITHIN THE RESIN AND SECURED TO THE OUTER SURFACE OF THE WATER CONDUIT, AND ELECTRICAL LEADS SECURED TO THE ELECTRODE MEANS AND EXTENDING OUTWARDLY THROUGH THE OPENING AND OPERATIVELY CONNECTED IN THE REGENERATION CONTROL CIRCUIT.
Claim 2
Dependent Claim
87 words
IN COMBINATION WITH A WATER SOFTENER TANK HAVING A SOFTENING RESIN AND HAVING A CONTROL VALVE AND A REGENERATION CONTROL CIRCUIT, THE IMPROVEMENT COMPRISING A WATER CONDUIT CONNECTED TO THE VALVE AND EXTENDING INWARDLY THROUGH AN OPENING IN THE TANK INTO THE RESIN, ELECTRODE MEANS INCLUDING AT LEAST THREE SEPARATE ELECTRODES DISPOSED WITHIN THE RESIN AND SECURED TO THE OUTER SURFACE OF THE WATER CONDUIT, AND ELECTRICAL LEADS SECURED TO THE ELECTRODE MEANS AND EXTENDING OUTWARDLY THROUGH THE OPENING AND OPERATIVELY CONNECTED IN THE REGENERATION CONTROL CIRCUIT.
References Cited (Backward Citations)
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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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |