Patent US2555091A successfully refreshed from Google Patents.
US2555091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube
Assignee: EMI Ltd
•
Filing: 1949-01-26
•
Granted: 1951-05-29
•
Expires: 1969-01-26
Abstract
No abstract record available.
Inventors
- 👤 Lubszynski Hans Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:29
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/34; H01J31/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1747988A
Cited
US2150980A
Cited
US2324504A
Cited
US2404046A
Cited
US2404098A
Cited
US2415842A
Cited
US2407485A
Cited
US2489127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |