US2456973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trace blanking circuit for cathoderay oscilloscopes
Assignee: AT&T Inc
•
Filing: 1945-10-10
•
Granted: 1948-12-21
•
Expires: 1965-10-10
Abstract
No abstract record available.
Inventors
- 👤 Yu-Yueh A Mao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:45
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2222943A
Cited
US2313967A
Cited
US2375709A
Cited
US2415870A
Cited
US2355363A
Cited
US2425330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |