Patent US2526777A successfully refreshed from Google Patents.
US1674488A
Expired / Lapsed
US
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Electric heating unit
Assignee: General Electric Co
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Filing: 1922-12-20
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Granted: 1928-06-19
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Expires: 1942-12-20
Abstract
No abstract record available.
Inventors
- 👤 Bernhard G Tang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
H; H05; H05B; H05B3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087
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) | 1931-06-19 | 1931-12-19 | 1932-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-06-19 | 1935-12-19 | 1936-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-06-19 | 1939-12-19 | 1940-06-19 | $7700.00 | Window Closed / Lapsed |