The logo you created is eligible to be trademarked. It is the combination of the symbol, color, name of your company and typeface that together make an original logo. To submit for trademark, there are two links that will provide you with more information about trademarking through the US Trademark office.
Please know, once you purchase the high resolution logo, it's yours. Since you created it, it is unique to you. The elements you choose to use are a part of our database, but you make the logo uniquely your own by making the colors, effects, etc.