US3198724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot water heater with electrical scale control
Assignee: Whirlpool Corp
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Filing: 1960-08-17
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Granted: 1965-08-03
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Expires: 1980-08-17
Abstract
No abstract record available.
Inventors
- 👤 John T Cross
- 👤 Cohen David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:16
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/4602; F; F24; F24D; F24D19/00; F24D19/0092; F24H; F24H15/00; F24H15/20; F24H15/288; F24H9/00; F24H9/20; F24H9/2007; F24H9/2035; F24H9/40; F24H9/45; F24H9/455; C02F2303/00; C02F2303/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A HOT WATER HEATER COMPRISING: A TANK FOR HOLDING WATER TO BE HEATED; MEANS FOR DELIVERING HEAT ENERGY THROUGH ONE PORTION OF THE TANK; AN INERT, CONDUCTIVE LINER; DIELECTRIC MEANS SECURING THE LINER TO THE INNER SURFACE OF SAID ONE TANK PORTION TO COVER SAID TANK PORTION; AN ELECTRODE SPACE FROM THE LINER TO HAVE CONTACT WITH WATER IN THE TANK; AND MEANS CAUSING A DIRECT CURRENT OF AT LEAST APPROXIMATELY 0.8 MILLAMPERE PER SQUARE INCH TO FLOW THROUGH THE WATER IN THE TANK FROM THE LINER TO THE ELECTRODE WHEREBY THE LINER EFFECTIVELY COMPRISES AN ANODE AND THE ELECTRODE EFFECTIVELY COMPRISES A CATHODE.
Claim 2
Dependent Claim
104 words
A HOT WATER HEATER COMPRISING: A TANK FOR HOLDING WATER TO BE HEATED; MEANS FOR DELIVERING HEAT ENERGY THROUGH ONE PORTION OF THE TANK; AN INERT, CONDUCTIVE LINER; DIELECTRIC MEANS SECURING THE LINER TO THE INNER SURFACE OF SAID ONE TANK PORTION TO COVER SAID TANK PORTION; AN ELECTRODE SPACE FROM THE LINER TO HAVE CONTACT WITH WATER IN THE TANK; AND MEANS CAUSING A DIRECT CURRENT OF AT LEAST APPROXIMATELY 0.8 MILLAMPERE PER SQUARE INCH TO FLOW THROUGH THE WATER IN THE TANK FROM THE LINER TO THE ELECTRODE WHEREBY THE LINER EFFECTIVELY COMPRISES AN ANODE AND THE ELECTRODE EFFECTIVELY COMPRISES A CATHODE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |