Biopatents are exclusive rights granted by a government to inventors or their assignee for a limited period of time in exchange for a public disclosure of an invention. Patents should satisfying the following criteria, except

A patent is a right granted by a government to an inventor to prevent others from commercial use of his invention. A patent is granted for –
(A) An invention [including product]
(B) An improvement in an earlier invention
(C) The process of generating products and
(D) A concept or design.

But bio-patent cannot be issued for unpatented traditional knowledge.