Patent US1816680A successfully refreshed from Google Patents.
US1816680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical coil and method of manufacturing same
Assignee: ECONOMY FUSE AND MANUFACTURING Co
•
Filing: 1929-09-03
•
Granted: 1931-07-28
•
Expires: 1949-09-03
Abstract
No abstract record available.
Inventors
- 👤 Kurath Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:30
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1934-07-27 | 1935-01-26 | 1935-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-27 | 1939-01-26 | 1939-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-27 | 1943-01-26 | 1943-07-28 | $7700.00 | Window Closed / Lapsed |