According to Article 22, Paragraph 3 of the R.O.C. Patent Act, a disclosure made by or against the applicant’s will shall not be deemed as one of the circumstances that would preclude the grant of an invention patent prescribed in the subparagraphs of Paragraph 1 or the preceding paragraph, provided that the concerned patent application is filed within twelve months after the date of the disclosure. The twelve- month period mentioned above is called ___.