Patent US2492774A successfully refreshed from Google Patents.
US2492774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable electric heater
Assignee: Individual
•
Filing: 1945-11-14
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Granted: 1949-12-27
•
Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Wild Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:49
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H3/0411; F24H3/0417
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2078548A
Cited
US1678059A
Cited
US1788515A
Cited
US1991280A
Cited
US1958007A
Cited
US2087214A
Cited
US2203425A
Cited
US2303447A
Cited
US2360071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |