US1745175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling electric currents
Assignee: Individual
•
Filing: 1926-10-08
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Granted: 1930-01-28
•
Expires: 1946-10-08
Abstract
No abstract record available.
Inventors
- 👤 Lilienfeld Julius Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:54
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H10; H10D; H10D30/00; H10D30/60; H10D30/67; H10D30/674; H10D30/675; H10D99/00
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) | 1933-01-27 | 1933-07-29 | 1934-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-01-27 | 1937-07-29 | 1938-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-01-27 | 1941-07-29 | 1942-01-28 | $7700.00 | Window Closed / Lapsed |