The mark consists of outer and inner concentric circles with the wording "AIR BURNERS BURN CLEAN" appearing between the circles in an arc shaped format. A representation of a flame appears within the inner circle.
013, 021, 023, 031, 034
Color is not claimed as a feature of the mark.
Fire (flames), other than emanating from objects, words, numbers, fireplaces or candles , Circles, two concentric