Patent US2551489A successfully refreshed from Google Patents.
Patent US2440283A successfully refreshed from Google Patents.
US2440283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balancing of electrical bridge circuits containing nonlinear elements
Assignee: International Standard Electric Corp
•
Filing: 1943-11-20
•
Granted: 1948-04-27
•
Expires: 1963-11-20
Abstract
No abstract record available.
Inventors
- 👤 Levy Maurice Moise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/22; G01R17/00; G01R17/10; G01R17/16; H; H03; H03F; H03F3/00; H03F3/34; H03F3/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1966047A
Cited
US2008855A
Cited
US1969518A
Cited
US2190743A
Cited
US2147729A
Cited
US2147446A
Cited
US2305307A
Cited
US2311807A
Cited
US2289951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |