US3293408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer unit for space heater
Assignee: Individual
•
Filing: 1964-06-04
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Granted: 1966-12-20
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Expires: 1984-06-04
Abstract
No abstract record available.
Inventors
- 👤 Stotz Richard Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:53
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/002; F24H3/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
AN ELECTRIC WATER HEATER FOR A BASEBOARD SPACE HEATER, COMPRISING, A FIRST ELONGATED CHAMBER ADAPTED TO BE POSITIONED HORIZONTALLY, AN ELECTRIC HEATING ELEMENT LOCATED WITHIN AND EXTENDING LENGTHWISE OF SAID CHAMBER, A SECOND CHAMBER LOCATED ABOVE AND EXTENDING PARALLEL TO SAID FIRST CHAMBER, MEANS JOINING SAID CHAMBERS AND PROVIDING COMMUNICATION BETWEEN SAID CHAMBERS THROUGHOUT A MAJOR PORTION OF THE LENGTH OF SAID HEATING ELEMENT, A THIRD CHAMBER LOCATED BENEATH SAID FIRST CHAMBER AND EXTENDING PARALLEL THERETO, MEANS JOINING SAID FIRST AND THIRD CHAMBERS AND PROVIDING COMMUNICATION THEREBETWEEN THROUGHOUT A MAJOR PORTION OF THE LENGTH OF SAID HEATING ELEMENT, AND MEANS AT AN END OF SAID SECOND AND THIRD CHAMBERS TO RECEIVE THE ENDS OF A RADIATOR TUBE.
Claim 2
Dependent Claim
117 words
AN ELECTRIC WATER HEATER FOR A BASEBOARD SPACE HEATER, COMPRISING, A FIRST ELONGATED CHAMBER ADAPTED TO BE POSITIONED HORIZONTALLY, AN ELECTRIC HEATING ELEMENT LOCATED WITHIN AND EXTENDING LENGTHWISE OF SAID CHAMBER, A SECOND CHAMBER LOCATED ABOVE AND EXTENDING PARALLEL TO SAID FIRST CHAMBER, MEANS JOINING SAID CHAMBERS AND PROVIDING COMMUNICATION BETWEEN SAID CHAMBERS THROUGHOUT A MAJOR PORTION OF THE LENGTH OF SAID HEATING ELEMENT, A THIRD CHAMBER LOCATED BENEATH SAID FIRST CHAMBER AND EXTENDING PARALLEL THERETO, MEANS JOINING SAID FIRST AND THIRD CHAMBERS AND PROVIDING COMMUNICATION THEREBETWEEN THROUGHOUT A MAJOR PORTION OF THE LENGTH OF SAID HEATING ELEMENT, AND MEANS AT AN END OF SAID SECOND AND THIRD CHAMBERS TO RECEIVE THE ENDS OF A RADIATOR TUBE.
References Cited (Backward Citations)
US1069679A
Cited
US2700505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |