US2770749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube comprising a luminescent screen
Assignee: Hartford National Bank and Trust Co
•
Filing: 1952-10-30
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Granted: 1956-11-13
•
Expires: 1972-10-30
Abstract
No abstract record available.
Inventors
- 👤 Bril Alfred
- 👤 Hendrik A Klasens
- 👤 Zalm Pieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:07
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB311282A
Cited
US2225044A
Cited
US2450548A
Cited
US2488733A
Cited
US2521571A
Cited
US2455415A
Cited
US2596509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |