Patent US2038476A successfully refreshed from Google Patents.
US2038476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heater
Assignee: AUTOMATIC ELECTRIC HEATER Co
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Filing: 1932-07-29
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Granted: 1936-04-21
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Expires: 1952-07-29
Abstract
No abstract record available.
Inventors
- 👤 Gordon H Clark
- 👤 Warren F Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:24
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2014; F24H9/2021; F24H15/00; F24H15/10; F24H15/174; F24H15/20; F24H15/212; F24H15/223; F24H15/30; F24H15/355; F24H15/37
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) | 1939-04-21 | 1939-10-21 | 1940-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-21 | 1943-10-21 | 1944-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-21 | 1947-10-21 | 1948-04-21 | $7700.00 | Window Closed / Lapsed |