Patent US5683406A successfully refreshed from Google Patents.
US2090922A
Expired / Lapsed
US
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Braun tube for producing television images rich in contrast
Assignee: Individual
•
Filing: 1933-10-18
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Granted: 1937-08-24
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Expires: 1953-10-18
Abstract
No abstract record available.
Inventors
- 👤 Ardenne Manfred Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:27
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/185; H01J29/86; H01J29/88
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-08-23 | 1941-02-22 | 1941-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-23 | 1945-02-22 | 1945-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-23 | 1949-02-22 | 1949-08-24 | $7700.00 | Window Closed / Lapsed |