US2644909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit-arrangement comprising a cathode-ray tube
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-02-13
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Granted: 1953-07-07
•
Expires: 1971-02-13
Abstract
No abstract record available.
Inventors
- 👤 Beurs Pieter Hendrik De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:11
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/04; H03; H03K; H03K29/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2564908A
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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) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |