US2547412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency mixer
Assignee: Individual
•
Filing: 1945-05-23
•
Granted: 1951-04-03
•
Expires: 1965-05-23
Abstract
No abstract record available.
Inventors
- 👤 Winfield W Salisbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0625; H01; H01F; H01F5/00; H01F2005/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2034826A
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US2192715A
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US2124212A
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US2115826A
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US2163775A
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US2253589A
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US2351604A
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US2460109A
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US2433386A
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US2455657A
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US2436830A
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US2442776A
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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) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |