Patent US2249494A successfully refreshed from Google Patents.
US2249494A
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US
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High frequency apparatus
Assignee: General Electric Co
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Filing: 1939-12-22
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Granted: 1941-07-15
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Expires: 1959-12-22
Abstract
No abstract record available.
Inventors
- 👤 Ramo Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:07
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/78; H03; H03B; H03B9/00; H03B9/01
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) | 1944-07-14 | 1945-01-13 | 1945-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-14 | 1949-01-13 | 1949-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-14 | 1953-01-13 | 1953-07-15 | $7700.00 | Window Closed / Lapsed |