Patent US3916366A successfully refreshed from Google Patents.
US3916366A
Expired / Lapsed
US
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Thick film varistor and method of making the same
Assignee: Dale Electronics Inc
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Filing: 1974-10-25
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Granted: 1975-10-28
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Expires: 1994-10-25
Abstract
Abstract A thick film varistor comprising a substrate material having a varistor film or material printed thereon. Terminal conductors are electrically connected to the varistor film to terminate the varistor. The varistor material is comprised of a reacted material consisting of nickel oxide and lithium carbonate. The varistor material may also comprise glass frit material, solvent material and binder materials mixed with the reacted material. If desired, electrically conductive metal powders may be incorporated in the varistor material to vary the resistivity of the varistor material. The method of making varistor is also disclosed.
Inventors
- 👤 Clinton F Jefferson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:39
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06533; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
40 words
A THICK FILM VARISTOR, COMPRISING A SUBSTRATE MATERIAL, A VARISTOR MAERIAL POSITONED ON SAID SUBSTRATE MATERIAL, TERMINAL CONDUCTORS ELECTRICALLY CONNECTED TO SAID VARISTOR MATERIAL, SAID VARISTOR MATERIAL BEING COMPRISED OF A REACTED MATERIAL CONSISTING OF NICKEL OXIDE AND LITHIUM CARBONATE.
Claim 2
Dependent Claim
40 words
A THICK FILM VARISTOR, COMPRISING A SUBSTRATE MATERIAL, A VARISTOR MAERIAL POSITONED ON SAID SUBSTRATE MATERIAL, TERMINAL CONDUCTORS ELECTRICALLY CONNECTED TO SAID VARISTOR MATERIAL, SAID VARISTOR MATERIAL BEING COMPRISED OF A REACTED MATERIAL CONSISTING OF NICKEL OXIDE AND LITHIUM CARBONATE.
Claim 3
Dependent Claim
37 words
The varistor of claim 1 wherein said lithium carbonate comprises 1 to 6 percent by weight of the said reacted material and wherein said nickel oxide comprises 94 to 99 percent by weight of the reacted material.
Claim 4
Dependent Claim
20 words
The varistor of claim 1 wherein said varistor material also comprises a glass frit material mixed with said reacted material.
Claim 5
Dependent Claim
25 words
The varistor of claim 3 wherein said varister material also comprises solvent and binder materials mixed with said glass frit material and said reacted material.
Claim 6
Dependent Claim
25 words
The varistor of claim 3 wherein said varistor material also comprises electrically conductive metal powders mixed with said glass frit material and said reacted material.
Claim 7
Dependent Claim
12 words
The varistor of claim 5 wherein said metal powder is silver powder.
Claim 8
Dependent Claim
12 words
The varistor of claim 5 wherein said metal powder is nickel powder.
Claim 9
Dependent Claim
21 words
The varistor of claim 4 wherein said solvent material is butyl carbitol acetate and wherein said binder material is ethyl cellulose.
Claim 10
Dependent Claim
44 words
The varistor of claim 1 wherein said varistor material approximately comprises 17.06 percent by weight nickel oxide-lithium carbonate; 17.06 percent by weight nickel powder; 22.75 percent by weight glass frit; 7.84 percent by weight ethyl cellulose; and 35.29 percent by weight butyl carbitol acetate.
Claim 11
Dependent Claim
38 words
The varistor of claim 1 wherein said varistor material approximately comprises 34.12 percent by weight nickel oxide-lithium carbonate; 22.75 percent by weight glass frit; 7.84 percent by weight ethyl cellulose; and 35.29 percent by weight butyl carbitol acetate.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |