US1689369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric furnace for glowing metal bands by induction currents
Assignee: Individual
•
Filing: 1927-11-29
•
Granted: 1928-10-30
•
Expires: 1947-11-29
Abstract
No abstract record available.
Inventors
- 👤 Tama Manuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:36
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/06; H; H05; H05B; H05B6/00; H05B6/02; H05B6/22
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) | 1931-10-30 | 1932-04-30 | 1932-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-30 | 1936-04-30 | 1936-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-30 | 1940-04-30 | 1940-10-30 | $7700.00 | Window Closed / Lapsed |