Patent US3399718A successfully refreshed from Google Patents.
US3399718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam operated hot water heater
Assignee: Individual
•
Filing: 1965-02-08
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Granted: 1968-09-03
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Expires: 1985-02-08
Abstract
No abstract record available.
Inventors
- 👤 Jr James A Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:00
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0007; F22; F22B; F22B1/00; F22B1/02; F22B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A HOT WATER TANK, MEANS FOR HEATING WATER IN SAID TANK, A WATER INLET PIPE PROJECTING INTO SAID TANK NEAR THE BOTTOM THEREOF, CONTROL MEANS PROVIDED ON SAID HOT WATER TANK ADJACENT TO SAID WATER INLET, SAID CONTROL MEANS BEING ADAPTED TO RESPOND TO TEMPERATURE CHANGES WITHIN SAID HOT WATER TANK AND BEING ELECTRICALLY CONNECTED TO A SOLENOID STEAM VALVE, A STEAM INLET PIPE PROJECTING INTO SAID TANK NEAR THE BOTTOM THEREOF, SAID SOLENOID STEAM VALVE BEING CONNECTED TO SAID STEAM INLET PIPE AND BEING ADAPTED TO CLOSED AND OPEN THE PASSAGEWAY FOR STEAM IN SAID STEAM INLET PIPE, A WATER OUTLET PIPE OPENING INTO SAID HOT WATER TANK AT AN ELEVATION ABOVE SAID IN LET PIPE, AND A STEAM CONDENSATE OUTLET PIPE PROJECTING INTO SAID
Claim 2
Dependent Claim
126 words
A HOT WATER TANK, MEANS FOR HEATING WATER IN SAID TANK, A WATER INLET PIPE PROJECTING INTO SAID TANK NEAR THE BOTTOM THEREOF, CONTROL MEANS PROVIDED ON SAID HOT WATER TANK ADJACENT TO SAID WATER INLET, SAID CONTROL MEANS BEING ADAPTED TO RESPOND TO TEMPERATURE CHANGES WITHIN SAID HOT WATER TANK AND BEING ELECTRICALLY CONNECTED TO A SOLENOID STEAM VALVE, A STEAM INLET PIPE PROJECTING INTO SAID TANK NEAR THE BOTTOM THEREOF, SAID SOLENOID STEAM VALVE BEING CONNECTED TO SAID STEAM INLET PIPE AND BEING ADAPTED TO CLOSED AND OPEN THE PASSAGEWAY FOR STEAM IN SAID STEAM INLET PIPE, A WATER OUTLET PIPE OPENING INTO SAID HOT WATER TANK AT AN ELEVATION ABOVE SAID IN LET PIPE, AND A STEAM CONDENSATE OUTLET PIPE PROJECTING INTO SAID
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |