US4371860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solderable varistor
Assignee: General Electric Co
•
Filing: 1981-12-28
•
Granted: 1983-02-01
•
Expires: 2001-12-28
Abstract
Abstract A low leakage varistor which is resistant to the high temperature, corrosive conditions encountered during assembly of such devices includes a protective layer disposed on the surface of the varistor body between first and second, spaced-apart electrodes. Both, varistors with electrodes on opposing major surfaces and varistors with laterally spaced electrodes on a single surface are described.
Inventors
- 👤 John E. May
- 👤 Steven R. Zohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:55
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/02; H01C1/034; H01C1/14; H01C1/144; H01C7/00; H01C7/10; H01C7/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A metal oxide varistor having low leakage comprising: a body consisting essentially of metal oxide and at least one additive; first and second spaced apart electrodes applied directly to said body; a protective layer of polyimide silicone on the surface of said body between said electrodes and covering the edges of said electrodes, said layer being resistant to solder and solder-borne contaminants and having respective openings therein exposing and defining a solder attachment region on the surface of each of said electrodes; each of said electrodes having on its exposed surface a respective layer of solder; and first and second electrically conductive leads connected respectively to said first and second electrodes by said respective layers of solder.
Claim 2
Dependent Claim
117 words
A metal oxide varistor having low leakage comprising: a body consisting essentially of metal oxide and at least one additive; first and second spaced apart electrodes applied directly to said body; a protective layer of polyimide silicone on the surface of said body between said electrodes and covering the edges of said electrodes, said layer being resistant to solder and solder-borne contaminants and having respective openings therein exposing and defining a solder attachment region on the surface of each of said electrodes; each of said electrodes having on its exposed surface a respective layer of solder; and first and second electrically conductive leads connected respectively to said first and second electrodes by said respective layers of solder.
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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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |