US836659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction-coil apparatus.
Assignee: Individual
•
Filing: —
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Granted: 1906-11-20
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Expires: 1923-11-20
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/40
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) | 1909-11-19 | 1910-05-21 | 1910-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-11-19 | 1914-05-21 | 1914-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-11-19 | 1918-05-21 | 1918-11-20 | $7700.00 | Window Closed / Lapsed |