On 2 April 2020, Advance Nanotek,[22] an Australian producer of zinc oxide, filed a joint patent application with AstiVita Limited,[23] for an anti-viral composition that included various oral care products[24] containing hinokitiol as a vital component. The brand that is now incorporating this new invention is called Dr Zinx and is likely to release its Zinc + Hinokitiol combination in 2020.[25][26] On the 18th of May 2020 Dr ZinX published test results for a “Quantitative suspension test for evaluation of virucidal activity in the medical area”[27][28] returning a '3.25 log' reduction (99.9% reduction) for a neat concentration in 5 minutes against COVID-19 surrogate Feline Coronavirus.[29] Zinc is an essential dietary supplement and trace element in the body.