Patent US2910249A successfully refreshed from Google Patents.
Patent US1735831A successfully refreshed from Google Patents.
US1735831A
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US
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Electric heater and method of making the same
Assignee: Cutler Hammer Inc
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Filing: 1925-05-07
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Granted: 1929-11-12
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Expires: 1945-05-07
Abstract
No abstract record available.
Inventors
- 👤 Edwin N Lightfoot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:28
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49089; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49885
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) | 1932-11-11 | 1933-05-13 | 1933-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-11 | 1937-05-13 | 1937-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-11 | 1941-05-13 | 1941-11-12 | $7700.00 | Window Closed / Lapsed |