US2418844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high frequency tube
Assignee: Raytheon Co
•
Filing: 1943-04-01
•
Granted: 1947-04-15
•
Expires: 1963-04-01
Abstract
No abstract record available.
Inventors
- 👤 James D Van Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:03
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/22; H01J25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2128234A
Cited
GB422869A
Cited
US2163589A
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US2252118A
Cited
US2183215A
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US2281935A
Cited
US2293180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |