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Class Information
Number: 181/245
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Corrosion prevention > Internally coated parts
Description: Subject matter wherein at least some of the fluid contacting surfaces of the conducting devices are coated so as to prevent corrosion.

Patents under this class:

Patent Number Title Of Patent Date Issued
7263826 Muffler device with catalysts for improving purifying exhaust gas of nitrogen oxides within a motorcycle exhaust pipe Sep. 4, 2007
6582835 Coated ferrite stainless steel sheet usable in the automobile exhaust sector Jun. 24, 2003
5477014 Muffler device for internal combustion engines Dec. 19, 1995
4930678 Heat-resistant exhaust manifold and method of preparing same Jun. 5, 1990
4808441 Metal articles having corrosion-resistant epoxy coatings Feb. 28, 1989
4610700 Adsorbent composition useful in retarding corrosion in mufflers Sep. 9, 1986
4382487 Exhaust muffler of enamelled steel sheet metal and method of producing it May. 10, 1983
4341842 Method of coating automotive parts with silicone compositions Jul. 27, 1982

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