Patent US2602914A successfully refreshed from Google Patents.
US2602914A
Expired / Lapsed
US
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Electronic tube
Assignee: ExxonMobil Oil Corp
•
Filing: 1946-04-02
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Granted: 1952-07-08
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Expires: 1966-04-02
Abstract
No abstract record available.
Inventors
- 👤 Carleton H Schlesman
- 👤 Clarence I Glassbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:45
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB451830A
Cited
US1328041A
Cited
US1925110A
Cited
US2197398A
Cited
US2152639A
Cited
US2149847A
Cited
US2347715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |