US2568668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube focusing device of the permanent magnet type
Assignee: Best Manufacturing Co Inc
•
Filing: 1950-08-18
•
Granted: 1951-09-18
•
Expires: 1970-08-18
Abstract
No abstract record available.
Inventors
- 👤 William F Steers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/64; H01J29/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB462683A
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GB615553A
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US2533689A
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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) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |