Patent US3275800A successfully refreshed from Google Patents.
US3275800A
Expired / Lapsed
US
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Electric heater for use in a sauna bath
Assignee: Individual
•
Filing: 1963-06-28
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Granted: 1966-09-27
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 Kuoppamaki Lauri Juhani
- 👤 Kuoppamaki Eero Olavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
A; A61; A61H; A61H33/00; A61H33/06; A61H33/063; F; F24; F24H; F24H3/00; F24H3/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US882948A
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US1437142A
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US1484324A
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FR529694A
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US1705769A
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US1686860A
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US1932788A
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US2232492A
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US2564622A
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US2634362A
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US2654018A
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US2846692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |