US2440200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifying network for measuring alternating currents
Assignee: AC Cossor Ltd
•
Filing: 1945-03-14
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Granted: 1948-04-20
•
Expires: 1965-03-14
Abstract
No abstract record available.
Inventors
- 👤 Jofch Lionel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:37
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1929216A
Cited
US2316008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |