Patent US167902A successfully refreshed from Google Patents.
US2425702A
Expired / Lapsed
US
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Electric heater
Assignee: Individual
•
Filing: 1945-10-22
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Granted: 1947-08-12
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Expires: 1965-10-22
Abstract
No abstract record available.
Inventors
- 👤 George M Marr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:02
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/002; F24C; F24C7/00; F24C7/06; F24C7/062; F24C7/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1618364A
Cited
US1715287A
Cited
US1670437A
Cited
GB290134A
Cited
US1892882A
Cited
GB506529A
Cited
US2261496A
Cited
US2313786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |