US2520985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna coupling circuit
Assignee: Motorola Solutions Inc
•
Filing: 1947-10-22
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Granted: 1950-09-05
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Expires: 1967-10-22
Abstract
No abstract record available.
Inventors
- 👤 Fred B Williams
- 👤 Fred P Hill
- 👤 Blinoff William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:04
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/32; H01Q1/325; H01Q1/3291; H01Q21/00; H01Q21/06; H01Q21/20; H01Q21/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711745A
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US1626464A
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GB362530A
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US2285979A
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US2267047A
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US2255680A
Cited
CH219530A
Cited
US2334670A
Cited
US2383286A
Cited
US2441116A
Cited
US2439277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |