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Patent US4785276A successfully refreshed from Google Patents.
US4785276A
Expired / Lapsed
US
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Voltage multiplier varistor
Assignee: Littelfuse Inc
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Filing: 1986-09-26
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Granted: 1988-11-15
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Expires: 2006-09-26
Abstract
Abstract A varistor having a plurality of spaced electrodes positioned on common surface thereof and a conductive layer positioned on the opposed major surface thereof.
Inventors
- 👤 John E. May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:13
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/102
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A varistor comprising: a varistor body having a first major surface and an opposed second major surface; a plurality of conductive regions disposed in spaced relationship on said first surface; a plurality of conductive regions disposed in spaced relationship on said second surface; said conductive regions being positioned such that the distance separating any conductive region and the nearest adjacent conductive region on the same surface of the varistor body is greater than the distance separating that conductive region and the nearest conductive region on the opposed surface of the varistor body, wherein current will tend to flow from any of said conductive regions through the thickness of said varistor body to one of said conductive regions on the opposed surface of said varistor body.
Claim 2
Dependent Claim
125 words
A varistor comprising: a varistor body having a first major surface and an opposed second major surface; a plurality of conductive regions disposed in spaced relationship on said first surface; a plurality of conductive regions disposed in spaced relationship on said second surface; said conductive regions being positioned such that the distance separating any conductive region and the nearest adjacent conductive region on the same surface of the varistor body is greater than the distance separating that conductive region and the nearest conductive region on the opposed surface of the varistor body, wherein current will tend to flow from any of said conductive regions through the thickness of said varistor body to one of said conductive regions on the opposed surface of said varistor body.
Claim 3
Dependent Claim
93 words
A varistor comprising: a varistor body having opposed major surfaces; a plurality of spaced conductive regions formed on each of said opposed major surfaces; each of said conductive regions being positioned such that at least one conductive region on the opposed major surface of the varistor body is nearer to said conductive region than any conductive region on the same surface whereby current will tend to flow from one of said conductive regions through the thickness of said varistor body to the nearest one of said conductive regions on said supposed major surface.
Claim 4
Dependent Claim
93 words
A varistor comprising: a varistor body having opposed major surfaces; a plurality of spaced conductive regions formed on each of said opposed major surfaces; each of said conductive regions being positioned such that at least one conductive region on the opposed major surface of the varistor body is nearer to said conductive region than any conductive region on the same surface whereby current will tend to flow from one of said conductive regions through the thickness of said varistor body to the nearest one of said conductive regions on said supposed major surface.
Claim 5
Dependent Claim
18 words
A varistor according to claim 2 wherein an insulating material covers the nonconductive surface areas of said varistor.
Claim 6
Dependent Claim
16 words
A varistor according to claim 2 wherein the edges of the varistor have a metal coating.
Claim 7
Dependent Claim
21 words
A varistor according to claim 4 wherein said conductive material is positioned in alternating overlapping fashion on said opposed major surfaces.
Claim 8
Dependent Claim
16 words
A varistor according to claim 2 wherein an insulating material is disposed over said conductive surfaces.
Claim 9
Dependent Claim
16 words
A varistor according to claim 4 wherein an insulating material is disposed over said conductive surfaces.
Claim 10
Dependent Claim
100 words
A varistor body having opposed major surfaces; at least two electrodes on a first major surface to each of which is attached a lead, at least one layer of non-biased conductive material on a second major surface wherein the distance between the electrodes on said first major surface is greater than the distance between an electrode on said first surface and the conductive layer on said second surface whereby the voltage rating of said varistor becomes independent of the electrode spacing on said first surface above an electrode spacing about at least two times the thickness of said varistor body.
Claim 11
Dependent Claim
100 words
A varistor body having opposed major surfaces; at least two electrodes on a first major surface to each of which is attached a lead, at least one layer of non-biased conductive material on a second major surface wherein the distance between the electrodes on said first major surface is greater than the distance between an electrode on said first surface and the conductive layer on said second surface whereby the voltage rating of said varistor becomes independent of the electrode spacing on said first surface above an electrode spacing about at least two times the thickness of said varistor body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |