US3706949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency filter
Assignee: Nichicon Corp
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Filing: 1971-02-09
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Granted: 1972-12-19
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Expires: 1991-02-09
Abstract
Abstract A high frequency filter having a feed-through capacitor and inductances, the latter being wound on a single magnetic core and precisely positioned relative to the capacitor.
Inventors
- 👤 Takaya Kawakami
- 👤 Toshinori Kitamura
- 👤 Yoshio Ajichi
- 👤 Masayoshi Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/40; H03; H03H; H03H1/00; H03H1/0007
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A high frequency filter comprising an inductor and a capacitor, said inductor including at least two magnetically coupled coils wound in the same direction, and said capacitor including a pair of ceramic dielectric plates, each of said plates having a single outer electrode layer on one face thereof and at least two inner electrode layers on the other face thereof, said pair of ceramic dielectric plates being bonded together so that said inner electrode layers on the both ceramic dielectric plates face one another, at least two inner electrode terminal conductors placed respectively between said inner electrode layers on the both plates and connected respectively to said coils, and a ground terminal connected to said outer electrodes on the both ceramic plates.
Claim 2
Dependent Claim
122 words
A high frequency filter comprising an inductor and a capacitor, said inductor including at least two magnetically coupled coils wound in the same direction, and said capacitor including a pair of ceramic dielectric plates, each of said plates having a single outer electrode layer on one face thereof and at least two inner electrode layers on the other face thereof, said pair of ceramic dielectric plates being bonded together so that said inner electrode layers on the both ceramic dielectric plates face one another, at least two inner electrode terminal conductors placed respectively between said inner electrode layers on the both plates and connected respectively to said coils, and a ground terminal connected to said outer electrodes on the both ceramic plates.
Claim 3
Dependent Claim
18 words
The high frequency filter according to claim 1 wherein said coils are wound on a single magnetic core.
Claim 4
Dependent Claim
15 words
The high frequency filter according to claim 2 wherein said single magnetic core is rod-shaped.
Claim 5
Dependent Claim
15 words
The high frequency filter according to claim 2 wherein said single magnetic core is annular.
Claim 6
Dependent Claim
19 words
The high frequency filter according to claim 1 wherein said inductor and said capacitor are enclosed within synthetic resin.
References Cited (Backward Citations)
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Cited
US3297969A
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US3603902A
Cited
US3287670A
Cited
US3593217A
Cited
US3568109A
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US3572247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |