Patent US2378772A successfully refreshed from Google Patents.
US2378772A
Expired / Lapsed
US
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Electric water heater
Assignee: Individual
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Filing: 1942-06-25
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Granted: 1945-06-19
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Expires: 1962-06-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Hummel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:27
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/18; F24H9/1809; F24H9/1818; F24H1/00; F24H1/18; F24H1/20; F24H1/201; F24H1/202; F24H15/00; F24H15/10; F24H15/128; F24H15/132; F24H9/20; F24H9/2007; F24H9/2014; F24H9/2021; B; B67; B67B; B67B2201/00; B67B2201/06; B67B2201/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-06-18 | 1948-12-18 | 1949-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-06-18 | 1952-12-18 | 1953-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-06-18 | 1956-12-18 | 1957-06-19 | $7700.00 | Window Closed / Lapsed |