US2640093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage measuring device
Assignee: RCA Corp
•
Filing: 1949-12-22
•
Granted: 1953-05-26
•
Expires: 1969-12-22
Abstract
No abstract record available.
Inventors
- 👤 Edward W Herold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:19
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/155; G01R15/00; G01R15/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2108880A
Cited
US1994726A
Cited
US2128632A
Cited
AT150902B
Cited
US2495035A
Cited
US2435316A
Cited
US2509815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |