US2847597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: GTE Sylvania Inc
•
Filing: 1955-11-25
•
Granted: 1958-08-12
•
Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Bowie Robert Mcneil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:06
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/50; H01J2229/00; H01J2229/48; H01J2229/50; H01J2229/507
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732516A
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US2165028A
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US2141415A
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US2256297A
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US2457495A
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US2506627A
Cited
US2512858A
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US2587074A
Cited
US2758234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |