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US2401481A
Expired / Lapsed
US
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High-frequency signal generator
Assignee: Hazeltine Research Inc
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Filing: 1940-09-30
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Granted: 1946-06-04
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Expires: 1960-09-30
Abstract
No abstract record available.
Inventors
- 👤 Daniel E Harnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:26
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/06; H03; H03B; H03B21/00; H03B21/01; H03B21/02; H03J; H03J5/00; H03J5/24
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) | 1949-06-03 | 1949-12-03 | 1950-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-06-03 | 1953-12-03 | 1954-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-06-03 | 1957-12-03 | 1958-06-04 | $7700.00 | Window Closed / Lapsed |