US2752525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection circuit for cathode ray tubes
Assignee: Hartford National Bank and Trust Co
•
Filing: 1952-09-10
•
Granted: 1956-06-26
•
Expires: 1972-09-10
Abstract
No abstract record available.
Inventors
- 👤 Montague Bryan William S Leger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2152821A
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US2153216A
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US2222943A
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US2280670A
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US2366357A
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US2421520A
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US2444902A
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US2543831A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-26 | 1959-12-26 | 1960-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-26 | 1963-12-26 | 1964-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-26 | 1967-12-26 | 1968-06-26 | $7700.00 | Window Closed / Lapsed |