Patent US2520141A successfully refreshed from Google Patents.
US2520141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panoramic receiver for radio signals
Assignee: International Standard Electric Corp
•
Filing: 1943-05-24
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Granted: 1950-08-29
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Expires: 1963-05-24
Abstract
No abstract record available.
Inventors
- 👤 Hardy Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:04
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J7/32; G; G01; G01S; G01S1/00; G01S1/02; G01S7/00; G01S7/02; G01S7/40; G01S7/4004; G01S7/4008
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |