Patent US2419128A successfully refreshed from Google Patents.
US2419128A
Expired / Lapsed
US
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Mercury vapor tube
Assignee: Westinghouse Electric Corp
•
Filing: 1942-02-14
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Granted: 1947-04-15
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Expires: 1962-02-14
Abstract
No abstract record available.
Inventors
- 👤 George S Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:48
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1656956A
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US1929122A
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US1878338A
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US1689146A
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US1895858A
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US2088249A
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US2124682A
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US2078642A
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US2080914A
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US2217185A
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US2212849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |