US2090033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short wave discharge tube
Assignee: MEAF Machinerieen en Apparaten Fabrieken NV
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Filing: 1933-10-20
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Granted: 1937-08-17
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Expires: 1953-10-20
Abstract
No abstract record available.
Inventors
- 👤 Dallenbach Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/64
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) | 1940-08-16 | 1941-02-15 | 1941-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-16 | 1945-02-15 | 1945-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-16 | 1949-02-15 | 1949-08-17 | $7700.00 | Window Closed / Lapsed |