A varistor includes a ceramic base body having a surface. The varistor also includes an insulating layer on at least a portion of the surface of the ceramic base body. The insulating layer includes a base glass and filler. The filler includes 3Al 2 O 3 2SiO 2 .

Claims

14 · 2 independent · depth 3

14 granted claims

›1.independentA varistor, comprising:na ceramic body having a surface; andan insulating layer on at least a portion of the surface of the ceramic body, the insulati…+12

›2.↳ 1The varistor of claim 1, wherein the insulating layer has a filler content by weight of from about 5% to about 40%.d2

›3.↳ 1The varistor of claim 1, wherein the base glass comprises B2O3 and the base glass has a B2O3 content by weight of from about 30% to about 40%.d2

›4.↳ 1The varistor of claim 1, wherein the base glass comprises CuO and the base glass has a CuO content by weight less than or equal to about 10%.d2

›5.↳ 1The varistor of claim 1, wherein the base glass comprises P2O5 and has a P2O5 content by weight of less than or equal to about 10%.d2

›6.↳ 1The varistor of claim 1, wherein the ceramic body comprises end faces comprising metallizations.d2

›7.↳ 1The varistor of claim 1, wherein the varistor comprises a multilayer varistor.d2

›8.↳ 1The varistor of claim 1, wherein the insulating layer comprises material-strengthening fibers.d2+2

›10.↳ 1The varistor of claim 1, wherein the insulating layer comprises an organic composite material.d2

›11.↳ 1The varistor of claim 1, wherein the insulating layer comprises an inorganic composite material.d2

›12.↳ 1The varistor of claim 1, wherein the insulating layer comprises a material capable of being cured by increasing a temperature.d2

›14.independentA varistor, comprising:na ceramic body having a surface; andan insulating layer on at least a portion of the surface of the ceramic body, the insulati…

Classifications

6 codes

IPC · International Patent Classification

Section H — Electricity

H01C7/10

USPC · US Patent Classification

338/21361/111338/13361/127338/114

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

5.2 y

1,909 days filing → grant

Office actions

non-final + final

Responses

2 RCE

Examiner

Kyung Lee

art unit 2833 · TC 2800

Law firm

Law firm · Log in to unlock

Citations: 21 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20080030296 A1	7 Feb 2008

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.