US4675629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise filter
Assignee: Murata Manufacturing Co Ltd
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Filing: 1986-02-11
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Granted: 1987-06-23
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Expires: 2006-02-11
Abstract
Abstract A noise filter wherein a glass plate is fixedly provided in hermetic condition in a metal casing through which a central conductive member passes, a magnetic core is inserted into said central conductive member at one side of said glass plate, a pair of capacitors are respectively passing through the central conductive member at the side of said magnetic core and at the other side of said glass plate, and an insulative resin is filled at least in the opening side of the metal casing.
Inventors
- 👤 Yukio Sakamoto
- 👤 Shinichi Madokoro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
H; H03; H03H; H03H1/00; H03H1/0007; H04; H04B; H04B15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A noise filter which comprises: a metal casing opening at opposite ends thereof; a central conductive member to be inserted through said metal casing; a glass plate through which said central conductive member passes and which is provided at a predetermined position within said metal casing in hermetic condition; a magnetic core provided at a given position at one side of said glass plate within said metal casing, through which said central conductive member passes; a first capacitor having a pair of electrodes provided at a given position at the side of said magnetic core within said metal casing, through which said central conductive member passes, said pair of electrodes respectively fixedly connected to said central conductive member and said metal casing; a second capacitor having a pair of electrodes provided at a given position at the other side of said glass plate remote from said magnetic core within said metal casing, through which said central conductive member passes, said pair of electrodes respectively fixedly connected to said central conductive member and said metal casing; and an insulative resin filled at least into the opening side portion of said metal casing.
Claim 2
Dependent Claim
191 words
A noise filter which comprises: a metal casing opening at opposite ends thereof; a central conductive member to be inserted through said metal casing; a glass plate through which said central conductive member passes and which is provided at a predetermined position within said metal casing in hermetic condition; a magnetic core provided at a given position at one side of said glass plate within said metal casing, through which said central conductive member passes; a first capacitor having a pair of electrodes provided at a given position at the side of said magnetic core within said metal casing, through which said central conductive member passes, said pair of electrodes respectively fixedly connected to said central conductive member and said metal casing; a second capacitor having a pair of electrodes provided at a given position at the other side of said glass plate remote from said magnetic core within said metal casing, through which said central conductive member passes, said pair of electrodes respectively fixedly connected to said central conductive member and said metal casing; and an insulative resin filled at least into the opening side portion of said metal casing.
References Cited (Backward Citations)
US3579156A
Cited
US4329665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |