Patent US2566806A successfully refreshed from Google Patents.
US2544898A
Expired / Lapsed
US
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Centering device for beams of cathode-ray tubes
Assignee: Guardian Electric Manufacturing Co
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Filing: 1949-12-31
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Granted: 1951-03-13
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Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Obszarny Thedore
- 👤 Schmidt John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:42
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2224933A
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US2102421A
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GB464637A
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US2211613A
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US2274586A
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US2431077A
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US2460609A
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US2456474A
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US2498354A
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US2455977A
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US2513929A
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US2499065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |