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US770432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-potential induction-coil
Assignee: —
•
Filing: —
•
Granted: 1904-09-20
•
Expires: 1921-09-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:33
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/2823
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) | 1907-09-20 | 1908-03-21 | 1908-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-09-20 | 1912-03-21 | 1912-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-09-20 | 1916-03-21 | 1916-09-20 | $7700.00 | Window Closed / Lapsed |