Can't Lu Hua patent other oils?

Lu Hua patent on Aspergillus flavus can't use other oils. Because aflatoxin is a metabolite of trans-mold, the higher its content in food, the greater its harm to human health. Therefore, other oils patented by Lu Hua Aspergillus flavus cannot be used. Lu Hua patent oil of Aspergillus flavus is a kind of peanut oil with aflatoxin added, and its product name is Lu Hua Squeezed First Grade Peanut Oil.