US2444303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high frequency electronic tube
Assignee: GTE Sylvania Inc
•
Filing: 1944-10-21
•
Granted: 1948-06-29
•
Expires: 1964-10-21
Abstract
No abstract record available.
Inventors
- 👤 Henry J Mccarthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:56
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304868A
Cited
US2200023A
Cited
US2240183A
Cited
US2364732A
Cited
US2356414A
Cited
US2404116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |