US2473320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube
Assignee: AC Cossor Ltd
•
Filing: 1947-03-07
•
Granted: 1949-06-14
•
Expires: 1967-03-07
Abstract
No abstract record available.
Inventors
- 👤 Wynn Arthur Henry Ashford
- 👤 Hill Ronald Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:50
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/894; H01J29/02; H01J29/10; H01J29/18; H01J29/24; Y; Y10; Y10S; Y10S315/00; Y10S315/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2060825A
Cited
GB487241A
Cited
GB463891A
Cited
US2299047A
Cited
US2292979A
Cited
US2415311A
Cited
GB557771A
Cited
US2440735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |