20 According to the R.O.C. Patent Act, which of the following statements regarding to the patent invalidationis NOT correct?
(A) The patent invalidation is a kind of public examination.
(B) Whoever possesses legal interests due to the revocation of a patent may file an invalidation action after the said patent has become extinguished ipso facto.
(C) The patentee shall provide a response within one month after having been served with a copy of the request form from the Specific Patent Agency.
(D) The revocation of an invention patent right shall become final and binding if no administrative remedy proceedings are filed.