US2494992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube
Assignee: Westinghouse Electric Corp
•
Filing: 1943-04-02
•
Granted: 1950-01-17
•
Expires: 1963-04-02
Abstract
No abstract record available.
Inventors
- 👤 John P Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:42
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US789811A
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US1302353A
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US1969573A
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US2090922A
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GB426797A
Cited
US2124225A
Cited
US2171970A
Cited
US2195444A
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US2251984A
Cited
US2294209A
Cited
US2330604A
Cited
US2270307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |