Patent US2505909A successfully refreshed from Google Patents.
US2505909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube with oxide coated cathode
Assignee: Individual
•
Filing: 1948-02-26
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Granted: 1950-05-02
•
Expires: 1968-02-26
Abstract
No abstract record available.
Inventors
- 👤 Bishop H Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:49
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1860187A
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US1777253A
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US1840789A
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US1830162A
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US1954596A
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US1849594A
Cited
US1866729A
Cited
US1899136A
Cited
US1949094A
Cited
US2362510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |