US2898491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tubes
Assignee: EMI Ltd
•
Filing: 1956-01-27
•
Granted: 1959-08-04
•
Expires: 1976-01-27
Abstract
No abstract record available.
Inventors
- 👤 Pearce Ralph Reginald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:17
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/20; H01J29/00; H01J29/46; H01J29/48; H01J29/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563500A
Cited
FR866065A
Cited
US2459790A
Cited
US2593261A
Cited
US2674704A
Cited
US2761089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |