US3197613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric fluid heating device
Assignee: Dow Chemical Co
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Filing: 1962-02-15
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Granted: 1965-07-27
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Expires: 1982-02-15
Abstract
No abstract record available.
Inventors
- 👤 Michael F Ciemochowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:23
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/102; F24H1/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A HEAT EXCHANGER COMPRISING A HOUSING DEFINING A CHAMBER HAVING AN INNER WALL, SAID CHAMBER HAVING AT LEAST ONE RADIALLY DISPOSED PORT AND ONE GENERALLY AXIALLY DISPOSED PORT, THE RADIAL DIRECTION AND AXIAL DIRECTION BEING WITH REFERENCE AXIS OF A CONDUCTIVE, EDGE WOUND, GENERALLY HELICAL ELECTRICAL HEATER, SAID HEATER BEING A HELICALLY DISPOSED CONDUCTIVE RIBBON SAID HEATER DIFINING A CENTRALLY DISPOSED PASSAGEWAY, SAID HEATER HAVING A RELATIVELY NARROW PREDETERMINED SAID HEATER HAVING A RELATIVELY NARROW PREDETERMINED SPACING BETWEEN EACH TURN THEREOF. SAID HELICAL HEATER BEING POSITIONED IN SAID CHAMBER AND IN SPACED RELATIONSHIP TO THE WALL THEREOF, A SPACE BEING DEFINED BETWEEN SAID HEATER AND SAID WALL, SAID RADIALLY DISPOSED PORT BEING IN DIRECT COMMUNICATION WITH SAID SPACE AND SAID AXIALLY DISPOSED PORT BEING IN DIRECT COMMUNICATION WITH SAID PASSAGEWAY, SAID HELICAL HEATER BEING SUPPORTED BY ONLY THE TERMINAL PORTIONS THEREOF AND SUPPORTED BETWEEN SAID RADIALLY DISPOSED PORT AND SAID AXIALLY DISPOSED PORT AND SAID HEAT EXCHANGER BEING SO CONSTRUCTED AND ARRANGED THAT FLUID PASSING FROM RADIAL TO AN AXIAL PORT FLOWS THROUGH THE TURNS OF SAID HEATER.
Claim 2
Dependent Claim
178 words
A HEAT EXCHANGER COMPRISING A HOUSING DEFINING A CHAMBER HAVING AN INNER WALL, SAID CHAMBER HAVING AT LEAST ONE RADIALLY DISPOSED PORT AND ONE GENERALLY AXIALLY DISPOSED PORT, THE RADIAL DIRECTION AND AXIAL DIRECTION BEING WITH REFERENCE AXIS OF A CONDUCTIVE, EDGE WOUND, GENERALLY HELICAL ELECTRICAL HEATER, SAID HEATER BEING A HELICALLY DISPOSED CONDUCTIVE RIBBON SAID HEATER DIFINING A CENTRALLY DISPOSED PASSAGEWAY, SAID HEATER HAVING A RELATIVELY NARROW PREDETERMINED SAID HEATER HAVING A RELATIVELY NARROW PREDETERMINED SPACING BETWEEN EACH TURN THEREOF. SAID HELICAL HEATER BEING POSITIONED IN SAID CHAMBER AND IN SPACED RELATIONSHIP TO THE WALL THEREOF, A SPACE BEING DEFINED BETWEEN SAID HEATER AND SAID WALL, SAID RADIALLY DISPOSED PORT BEING IN DIRECT COMMUNICATION WITH SAID SPACE AND SAID AXIALLY DISPOSED PORT BEING IN DIRECT COMMUNICATION WITH SAID PASSAGEWAY, SAID HELICAL HEATER BEING SUPPORTED BY ONLY THE TERMINAL PORTIONS THEREOF AND SUPPORTED BETWEEN SAID RADIALLY DISPOSED PORT AND SAID AXIALLY DISPOSED PORT AND SAID HEAT EXCHANGER BEING SO CONSTRUCTED AND ARRANGED THAT FLUID PASSING FROM RADIAL TO AN AXIAL PORT FLOWS THROUGH THE TURNS OF SAID HEATER.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |