Patent US6241667B1 successfully refreshed from Google Patents.
US2570016A
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Superheterodyne receiving circuit arrangement
Assignee: Hartford National Bank and Trust Co
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Filing: 1948-03-16
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Granted: 1951-10-02
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Expires: 1968-03-16
Abstract
No abstract record available.
Inventors
- 👤 Carel Jan Van Loon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:36
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/46; H03F3/48; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2323250A
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US2067536A
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US2088043A
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US2058512A
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US2122283A
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US2201365A
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US2302867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |