US2351895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube device for ultra short waves
Assignee: Individual
•
Filing: 1941-05-13
•
Granted: 1944-06-20
•
Expires: 1961-05-13
Abstract
No abstract record available.
Inventors
- 👤 Allerding Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/68; H01J25/70; H01J21/00; H01J21/02; H01J21/06; H01J21/065
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) | 1947-06-20 | 1947-12-20 | 1948-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-06-20 | 1951-12-20 | 1952-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-06-20 | 1955-12-20 | 1956-06-20 | $7700.00 | Window Closed / Lapsed |