US2400814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube
Assignee: Metropolitan Vickers Electrical Co Ltd
•
Filing: 1943-09-21
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Granted: 1946-05-21
•
Expires: 1963-09-21
Abstract
No abstract record available.
Inventors
- 👤 Dodds John Mathieson
- 👤 Miller Charles Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:39
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/72; H01J29/76; G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-05-20 | 1949-11-19 | 1950-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-05-20 | 1953-11-19 | 1954-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-05-20 | 1957-11-19 | 1958-05-21 | $7700.00 | Window Closed / Lapsed |