Patent US2528667A successfully refreshed from Google Patents.
US2528667A
Expired / Lapsed
US
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Loop antenna
Assignee: AMERICAN PHENOLIC Corp
•
Filing: 1946-01-19
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Granted: 1950-11-07
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Expires: 1966-01-19
Abstract
No abstract record available.
Inventors
- 👤 Carl A Raabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:16
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US931445A
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US1739246A
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GB354290A
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US1874723A
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US2002344A
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US2081634A
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US2204782A
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US2218830A
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US2329634A
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US2282759A
Cited
US2403093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |