US2842704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device comprising an electric discharge tube for very high frequencies and a discharge tube for use in such a device
Assignee: US Philips Corp
•
Filing: 1951-01-04
•
Granted: 1958-07-08
•
Expires: 1971-01-04
Abstract
No abstract record available.
Inventors
- 👤 Bernardus Bastiaan Van Iperen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38; H01J23/00; H01J23/16; H01J23/24; H01J23/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2074478A
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US2145727A
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US2289756A
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US2289952A
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US2487656A
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US2653270A
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US2532545A
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US2643353A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |