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Patent US2170648A successfully refreshed from Google Patents.
US2170648A
Expired / Lapsed
US
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Electric discharge tube
Assignee: Alcatel Lucent Deutschland AG
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Filing: 1937-08-12
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Granted: 1939-08-22
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Expires: 1957-08-12
Abstract
No abstract record available.
Inventors
- 👤 Baier Otto
- 👤 Katsch Annemarie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:12
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J5/44; H01J2893/00; H01J2893/0033; H01J2893/0034; H01J2893/0036; Y; Y10; Y10T; Y10T403/00; Y10T403/47; Y10T403/477
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) | 1942-08-21 | 1943-02-20 | 1943-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-21 | 1947-02-20 | 1947-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-21 | 1951-02-20 | 1951-08-22 | $7700.00 | Window Closed / Lapsed |