US2519172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of electron discharge device of area selection type
Assignee: RCA Corp
•
Filing: 1946-08-30
•
Granted: 1950-08-15
•
Expires: 1966-08-30
Abstract
No abstract record available.
Inventors
- 👤 George W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:49
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/58; H01J31/66; G; G11; G11C; G11C11/00; G11C11/21; G11C11/23; H01J19/00; H01J19/28; H01J19/38; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0012; H01J2893/0015; H01J2893/0018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2000379A
Cited
US1946223A
Cited
US2155471A
Cited
US2122102A
Cited
US2182152A
Cited
US2172859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |