US2643302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device and circuits for neutralized coaxial line amplifiers
Assignee: International Standard Electric Corp
•
Filing: 1950-03-31
•
Granted: 1953-06-23
•
Expires: 1970-03-31
Abstract
No abstract record available.
Inventors
- 👤 Ervin M Bradburd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:33
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H03F1/00; H03F1/08; H03F1/14; H03F1/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2096459A
Cited
US2109843A
Cited
US2169396A
Cited
US2153728A
Cited
US2478216A
Cited
US2579820A
Cited
US2554502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |