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US2921236A
Expired / Lapsed
US
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Electrical discharge device
Assignee: Siemens and Halske AG
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Filing: 1955-11-16
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Granted: 1960-01-12
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Expires: 1975-11-16
Abstract
No abstract record available.
Inventors
- 👤 Gawehn Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:15
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/40; H01J17/44; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB763959A
Cited
US2185189A
Cited
US2409716A
Cited
US2459841A
Cited
US2453118A
Cited
US2740072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |