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Patent US2803770A successfully refreshed from Google Patents.
US2803770A
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Electron discharge tube apparatus
Assignee: Robert Bosch Fernsehanlagen GmbH
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Filing: 1951-09-11
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Granted: 1957-08-20
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Expires: 1971-09-11
Abstract
No abstract record available.
Inventors
- 👤 Harkensee Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:10
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/64; H01J29/66; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/30; H01J31/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2131185A
Cited
US2219113A
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US2219193A
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US2203734A
Cited
US2572644A
Cited
US2513221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |