US2800599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron-tube
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1952-04-29
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Granted: 1957-07-23
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Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Sternbeck Olaf
- 👤 Uhlmann Wolfram Erhard Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:40
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/23; G11C11/26; G11C11/265; H; H01; H01J; H01J31/00; H01J31/02; H01J31/08; H01J31/58; H03; H03K; H03K29/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2157529A
Cited
US2217774A
Cited
US2424289A
Cited
US2494670A
Cited
US2513743A
Cited
US2638541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |