Comparative law notes
The Brazilian Intellectual Property Act (Law No. 9,279 of 1996) itemises unpatentable elements and inventions (sec. 18).
não patenteável
adjetivo
full
unpatentable
adjective
Definitions of unpatentable
not capable of being granted a patent (=the official legal right granting exclusive rights to an inventor to make, use or sell an invention for a specified period of time)
Because Mohs paste is composed of natural ingredients and has been in use for so long, it is an unpatentable therapy.