Patent US2789201A successfully refreshed from Google Patents.
US2789201A
Expired / Lapsed
US
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Immersion heaters for bathroom tanks
Assignee: Individual
•
Filing: 1954-05-03
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Granted: 1957-04-16
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Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Sherwin George Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:18
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78; H05B3/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1075517A
Cited
US1222669A
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US1689198A
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US1837000A
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US2039641A
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US2201703A
Cited
US2527115A
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US2712590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |