US2000189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated rectifier
Assignee: BELI TELEPHONE LAB Inc
•
Filing: 1934-01-10
•
Granted: 1935-05-07
•
Expires: 1954-01-10
Abstract
No abstract record available.
Inventors
- 👤 James R Power
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:17
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/066; H02J; H02J2207/00; H02J2207/20; H02J7/00; H02J7/02; Y; Y10; Y10S; Y10S320/00; Y10S320/28; Y10S320/31
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) | 1938-05-06 | 1938-11-05 | 1939-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-06 | 1942-11-05 | 1943-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-06 | 1946-11-05 | 1947-05-07 | $7700.00 | Window Closed / Lapsed |