US2820206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave filters
Assignee: TDK Micronas GmbH
•
Filing: 1952-05-08
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Granted: 1958-01-14
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Expires: 1972-05-08
Abstract
No abstract record available.
Inventors
- 👤 Arditi Maurice
- 👤 Georges A Deschamps
- 👤 Elefant Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:51
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/02; H03L7/04; B; B07; B07C; B07C3/00; B07C3/003; B07C3/006; H01; H01P; H01P1/00; H01P1/18; H01P1/184; H01P1/20; H01P1/201; H01P1/203; H01P1/2039; H01P1/207; H01P1/209; H01P3/00; H01P3/02; H01P3/08; H01P3/085; H01P5/00; H01P5/02; H01P5/08; H01P5/10; H01P5/107; H01P5/12; H01P5/16; H01P5/18; H01P5/184; H01P5/185; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/247; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2411555A
Cited
US2424982A
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US2406945A
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GB584153A
Cited
US2579324A
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US2540488A
Cited
GB655803A
Cited
US2710946A
Cited
US2721312A
Cited
US2774046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |