Patent US3234543A successfully refreshed from Google Patents.
US685012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for increasing the intensity of electrical oscillations.
Assignee: Individual
•
Filing: 1900-03-21
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Granted: 1901-10-22
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Expires: 1920-03-21
Abstract
No abstract record available.
Inventors
- 👤 Nikola Tesla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:11
CPC Classifications
H; H04; H04B; H04B5/00; H04B5/20; H04B5/24; H04B5/26; H04B5/266; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/856; Y10S505/869; Y10S505/87; Y10S505/888
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) | 1904-10-21 | 1905-04-22 | 1905-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-10-21 | 1909-04-22 | 1909-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-10-21 | 1913-04-22 | 1913-10-22 | $7700.00 | Window Closed / Lapsed |