US2569667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical filter unit
Assignee: RCA Corp
•
Filing: 1946-07-18
•
Granted: 1951-10-02
•
Expires: 1966-07-18
Abstract
No abstract record available.
Inventors
- 👤 Robert L Harvey
- 👤 Vernon D Landon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:52
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030179A
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US2109843A
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US2163775A
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US2228797A
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US2221105A
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US2438913A
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US2409556A
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US2479687A
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US2399674A
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US2491681A
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US2456803A
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 |