US1841537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric furnace resistor
Assignee: HARPER ELECTRIC FURNACE CORP
•
Filing: 1925-11-27
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Granted: 1932-01-19
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Expires: 1945-11-27
Abstract
No abstract record available.
Inventors
- 👤 Kelleher James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:17
CPC Classifications
H; H05; H05B; H05B3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49098
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) | 1935-01-18 | 1935-07-20 | 1936-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-18 | 1939-07-20 | 1940-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-18 | 1943-07-20 | 1944-01-19 | $7700.00 | Window Closed / Lapsed |