US4595901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductance device with bonded metal foil electrodes
Assignee: TDK Corp
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Filing: 1984-02-16
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Granted: 1986-06-17
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Expires: 2004-02-16
Abstract
Abstract An inductance device comprises a coil wound on a magnetic core; and an electrode layer made of a metal foil bonded on an end surface of said magnetic core on which an end of said coil and an end of a lead wire are soldered on said metal foil.
Inventors
- 👤 Tadao Yahagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:47
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/027; H01F17/00; H01F17/04; H01F17/045; H01F27/28; H01F27/29; H01F2017/048
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
An inductance device comprising: a pair of lead wires; a magnetic core having an exterior lateral surface extending to opposed recessed ends defined by interior side surfaces extending to a recessed bottom surface; a coil would around said exterior lateral surface of said core, said coil having ends electrically connected to respective of said lead wires; a pair of metal foils each comprising a metal selected from the group consisting of copper and aluminum and each bonded directly to a respective recessed bottom surface of a respective recessed end of said core by means of a thermosettable binder contacting each foil and said respective recessed bottom surface, said metal foils each having a main surface contacting only a portion of the respective end of said core and not the entire side surface of said respective recessed end; and respective of said lead wires and coil ends electrically connected to each other by being soldered to respective of said metal foils.
Claim 2
Dependent Claim
160 words
An inductance device comprising: a pair of lead wires; a magnetic core having an exterior lateral surface extending to opposed recessed ends defined by interior side surfaces extending to a recessed bottom surface; a coil would around said exterior lateral surface of said core, said coil having ends electrically connected to respective of said lead wires; a pair of metal foils each comprising a metal selected from the group consisting of copper and aluminum and each bonded directly to a respective recessed bottom surface of a respective recessed end of said core by means of a thermosettable binder contacting each foil and said respective recessed bottom surface, said metal foils each having a main surface contacting only a portion of the respective end of said core and not the entire side surface of said respective recessed end; and respective of said lead wires and coil ends electrically connected to each other by being soldered to respective of said metal foils.
Claim 3
Dependent Claim
15 words
An inductance device according to claim 1, wherein said recessed bottom surfaces are substantially flat.
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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) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |