US2338237A
Expired / Lapsed
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High-frequency electron discharge apparatus
Assignee: Nokia Solutions and Networks Schweiz AG
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Filing: 1940-12-10
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Granted: 1944-01-04
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Expires: 1960-12-10
Abstract
No abstract record available.
Inventors
- 👤 Fremlin John Heaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:00
CPC Classifications
D; D01; D01G; D01G23/00; D01G23/02; D01G23/04; D01G23/045; G; G01; G01G; G01G13/00; H; H01; H01J; H01J25/00; H01J25/02; H01J25/06; H01J25/10; H01J25/12; H01P; H01P7/00; H01P7/04; H03; H03C; H03C3/00; H03C3/30; H03C7/00; H03C7/02
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) | 1947-01-03 | 1947-07-05 | 1948-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-01-03 | 1951-07-05 | 1952-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-01-03 | 1955-07-05 | 1956-01-04 | $7700.00 | Window Closed / Lapsed |