US1936309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction electric furnace
Assignee: AJAX ELECTROTHERMIE Corp
•
Filing: 1931-11-04
•
Granted: 1933-11-21
•
Expires: 1951-11-04
Abstract
No abstract record available.
Inventors
- 👤 Northrup Edwin Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:12
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/367; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
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) | 1936-11-20 | 1937-05-22 | 1937-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-11-20 | 1941-05-22 | 1941-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-11-20 | 1945-05-22 | 1945-11-21 | $7700.00 | Window Closed / Lapsed |