US2640868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic focusing device for cathode-ray tubes
Assignee: ALL STAR PRODUCTS Inc
•
Filing: 1950-11-04
•
Granted: 1953-06-02
•
Expires: 1970-11-04
Abstract
No abstract record available.
Inventors
- 👤 Ingle Donald Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:32
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)
US2305761A
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US2416687A
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US2440403A
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US2591820A
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US2533687A
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US2533688A
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US2533689A
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US2581657A
Cited
US2608665A
Cited
US2568668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |