FOULING RESISTANT SPARK PLUG
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United States of America Patent
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Issued Date -
Nov 14, 2013
app pub date -
May 11, 2012
filing date -
May 11, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed herein is a spark plug comprising an insulative sleeve. A glaze coating is disposed on the exterior surface of the insulative sleeve. The glaze coating comprises a silicate glass, a phosphorous glass, a borosilicate glass, or a combination of the foregoing glasses wherein the glasses are independently modified with a modifier selected from the group consisting of alkali group metals, alkali earth group metals, aluminum, and a combination of two or more of the foregoing modifiers and further wherein the glaze coating has a glass transition temperature (Tg) of 300 to 1000 degrees Celsius.
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