US2421138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave signal translating arrangement
Assignee: Hazeltine Research Inc
•
Filing: 1945-06-01
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Granted: 1947-05-27
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Expires: 1965-06-01
Abstract
No abstract record available.
Inventors
- 👤 Harold A Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:52
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/12; G; G01; G01S; G01S1/00; G01S1/02; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/32; H03G; H03G3/00; H03G3/20; H03G3/22
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) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |