Patent US4952144A successfully refreshed from Google Patents.
Patent US1804852A successfully refreshed from Google Patents.
US1804852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit controlling reactance coil
Assignee: NUWAY ELECTRIC Co
•
Filing: 1927-05-10
•
Granted: 1931-05-12
•
Expires: 1947-05-10
Abstract
No abstract record available.
Inventors
- 👤 Frank J Zamboni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:12
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10; H01F29/12
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) | 1934-05-11 | 1934-11-10 | 1935-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-11 | 1938-11-10 | 1939-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-11 | 1942-11-10 | 1943-05-12 | $7700.00 | Window Closed / Lapsed |