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US3450860A
Expired / Lapsed
US
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Liquid heater with high temperature safety control
Assignee: KNEISLEY ELECTRIC CO
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Filing: 1966-03-28
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Granted: 1969-06-17
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Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 Richard F Kneisley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:50
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE31353C
Cited
US2076709A
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FR867647A
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US2489560A
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US2834869A
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US2866884A
Cited
US3278395A
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US3272946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |