Patent US2631192A successfully refreshed from Google Patents.
US2631192A
Expired / Lapsed
US
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Permeability-tuned coupling unit
Assignee: Motorola Solutions Inc
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Filing: 1948-03-06
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Granted: 1953-03-10
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Expires: 1968-03-06
Abstract
No abstract record available.
Inventors
- 👤 Gus W Wallin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:26
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2318415A
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US2417182A
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US2447002A
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US2435630A
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US2462822A
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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) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |