About 2 Trademarks found that are filed by the law firm John M Guynn Workman Nydegger

Hydraulic cement compositions, namely, blended cements and other cement mixes that contain Portland cement and one or more pozzolans, such as a man-made pozzolan such as fly ash, slag, fumed silica or metakaolin, or a natural pozzolan such as volcanic ash, trass or diatomaceous earth, the foregoing for use in ready mix concrete

The mark consists of the letter "E" in design form.