US857560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for generating high-frequency alternating currents.
Assignee: Westinghouse Electric Corp
•
Filing: 1904-02-05
•
Granted: 1907-06-18
•
Expires: 1924-02-05
Abstract
No abstract record available.
Inventors
- 👤 Maurice Leblanc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:08
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/06; H02M5/08; G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06
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) | 1910-06-17 | 1910-12-17 | 1911-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-06-17 | 1914-12-17 | 1915-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-06-17 | 1918-12-17 | 1919-06-18 | $7700.00 | Window Closed / Lapsed |