US2458142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode assembly for electron discharge devices
Assignee: RCA Corp
•
Filing: 1944-03-08
•
Granted: 1949-01-04
•
Expires: 1964-03-08
Abstract
No abstract record available.
Inventors
- 👤 Barremore B Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:51
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CH42290A
Cited
US2084867A
Cited
US2147143A
Cited
GB509102A
Cited
CH215600A
Cited
US2411151A
Cited
US2410396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |