US2761992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge tube
Assignee: Siemens Reiniger Werke AG
•
Filing: 1951-08-08
•
Granted: 1956-09-04
•
Expires: 1971-08-08
Abstract
No abstract record available.
Inventors
- 👤 Fenner Eckhard
- 👤 Schmidt Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:32
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/24; H01J35/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1757233A
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US1824755A
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US1932635A
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US2350642A
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US2260927A
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US2290226A
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US2482275A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |