US790250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for increasing the discharge enery of electrical-vibration systems.
Assignee: Individual
•
Filing: 1904-04-22
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Granted: 1905-05-16
•
Expires: 1924-04-22
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand Braun
- 👤 Ragnar Haakan Rendahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:20
CPC Classifications
H; H03; H03B; H03B11/00; H03B11/02
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) | 1908-05-15 | 1908-11-14 | 1909-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-05-15 | 1912-11-14 | 1913-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-05-15 | 1916-11-14 | 1917-05-16 | $7700.00 | Window Closed / Lapsed |