US2571026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant circuit for ultrashort waves
Assignee: Hartford National Bank and Trust Co
•
Filing: 1947-02-05
•
Granted: 1951-10-09
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Expires: 1967-02-05
Abstract
No abstract record available.
Inventors
- 👤 Fruithof Barend Gerrit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:28
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1525778A
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US1552185A
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US1595184A
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US1955093A
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US2201199A
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US2171219A
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GB523888A
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US2251085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |