Patent US3003383A successfully refreshed from Google Patents.
US3309503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric sauna bath heater
Assignee: Dow Key Co Inc
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Filing: 1964-01-16
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Granted: 1967-03-14
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Expires: 1984-01-16
Abstract
No abstract record available.
Inventors
- 👤 Gordon M Dow
- 👤 Lowell T Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:37
CPC Classifications
A; A61; A61H; A61H33/00; A61H33/06; A61H33/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A HEATER FOR SAUNA BATH ENCLOSURES COMPRISING A COMBINATION: A HORIZONTALLY DISPOSED, SUBSTANTIALLY PLANAR HEATING ELEMENT HAVING A PLURALITY OF UPWARDLY AND DOWNWARDLY EXTENDING PROTRUSIONS FORMED INTEGRALLY THEREWITH; HEATING MEANS DISPOSED INTERIORLY OF SAID HEATING ELEMENT; A HOUSING THEREFOR, SAID HOUSING BEING ADAPTED TO SURROUND AND ENCLOSE SAID HEATING ELEMENT WHEREBY SAID HOUSING IS DIVIDED INTO UPPER AND LOWER CHAMBERS, EACH CONTAINING CORRESPONDING UPWARDLY AND DOWNWARDLY EXTENDING PLURALITIES OF SAID PROTRUSIONS, THE LOWER CHAMBER HAVING INLET AND OUTLET OPENINGS FOR THE TRANSMISSION OF AIR THERETHROUGH AND THE UPPER CHAMBER HAVING AN UPWARDLY DIRECTED OPENING FOR RECEIVING LIQUIDS TO BE VAPORIZED AND ALSO CONTAINING A PLURALITY OF SAID PROTRUSIONS ON THE HEATING ELEMENT; AND MEANS FOR SUPPLYIG AIR UNDER PRESSURE CONNECTED TO SAID INLET OPENING.
Claim 2
Dependent Claim
124 words
A HEATER FOR SAUNA BATH ENCLOSURES COMPRISING A COMBINATION: A HORIZONTALLY DISPOSED, SUBSTANTIALLY PLANAR HEATING ELEMENT HAVING A PLURALITY OF UPWARDLY AND DOWNWARDLY EXTENDING PROTRUSIONS FORMED INTEGRALLY THEREWITH; HEATING MEANS DISPOSED INTERIORLY OF SAID HEATING ELEMENT; A HOUSING THEREFOR, SAID HOUSING BEING ADAPTED TO SURROUND AND ENCLOSE SAID HEATING ELEMENT WHEREBY SAID HOUSING IS DIVIDED INTO UPPER AND LOWER CHAMBERS, EACH CONTAINING CORRESPONDING UPWARDLY AND DOWNWARDLY EXTENDING PLURALITIES OF SAID PROTRUSIONS, THE LOWER CHAMBER HAVING INLET AND OUTLET OPENINGS FOR THE TRANSMISSION OF AIR THERETHROUGH AND THE UPPER CHAMBER HAVING AN UPWARDLY DIRECTED OPENING FOR RECEIVING LIQUIDS TO BE VAPORIZED AND ALSO CONTAINING A PLURALITY OF SAID PROTRUSIONS ON THE HEATING ELEMENT; AND MEANS FOR SUPPLYIG AIR UNDER PRESSURE CONNECTED TO SAID INLET OPENING.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |