US2522872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling the path of travel of electrons in cathoderay tubes
Assignee: HEPPNER Manufacturing CO
•
Filing: 1949-01-10
•
Granted: 1950-09-19
•
Expires: 1969-01-10
Abstract
No abstract record available.
Inventors
- 👤 Myron R Heppner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:27
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/84; H01J29/845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2188579A
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US2181850A
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US2211613A
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US2212206A
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US2274586A
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US2472766A
Cited
US2460609A
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US2456474A
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US2455977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |