Patent US2580606A successfully refreshed from Google Patents.
US2580606A
Expired / Lapsed
US
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Cathode-ray tube focusing device
Assignee: Best Manufacturing Co Inc
•
Filing: 1951-03-21
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Granted: 1952-01-01
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Expires: 1971-03-21
Abstract
No abstract record available.
Inventors
- 👤 Schiel Wilhelm
- 👤 Norman E Zacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:43
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)
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US2234720A
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US2369796A
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US2431077A
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US2416687A
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US2418487A
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GB597255A
Cited
GB615553A
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US2503173A
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US2533687A
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US2533688A
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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) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |