2007年4月1日起進入PCT的申請案，PCT修改規定，讓申請人可以在主張優先權的12月期限過期後提出申請案，但仍須在過期後兩個月內送件，且能要求回復優先權主張，且進入美國國家階段的申請案，同樣可恢復超過12個月優先權主張
對於由外國、國際申請案進入美國的申請案：
37 CFR §1.17(t)則規定非故意延遲而欲恢復超過第一申請日後12月的優先權主張，費用需1,410美元（漲價後）
非故意延遲主張優先權的規定在於37 CFR 1.55(c)
若未於規定的期限內提出優先權主張（包括國外申請案優先權、國際申請案進入國家階段（365(a)）），則表示放棄優先權主張，但仍可提出延遲主張優先權的請願（petition），只要繳付費用（1410美元）與提出非故意延遲的理由（必要時，應包括前案之英文內容、圖式），相關單位會判斷是否為非故意延遲
其他參考：
美國專利法第119(a)條規定，優先權主張不得於超過第一申請案後12個月期限
[原英文]
35 U.S.C. 119(a) An application for patent for an invention filed in this country by any person who has, or whose legal representatives or assigns have, previously regularly filed an application for a patent for the same invention in a foreign country which affords similar privileges in the case of applications filed in the United States or to citizens of the United States, or in a WTO member country, shall have the same effect as the same application would have if filed in this country on the date on which the application for patent for the same invention was first filed in such foreign country, if the application in this country is filed within twelve months from the earliest date on which such foreign application was filed; but no patent shall be granted on any application for patent for an invention which had been patented or described in a printed publication in any country more than one year before the date of the actual filing of the application in this country, or which had been in public use or on sale in this country more than one year prior to such filing.
[原英文]
摘錄MPEP 1893.03(c)，2007年4月1日當日或以後的國際申請案允許優先權主張的恢復（已超過國外第一申請案12個月），但此優先權主張並不能在美國國家階段生效，原因是已經超過優先權主張的12個月期限
International applications filed on or after April 1, 2007 are subject to amended PCT Rules permitting restoration of a right of priority. See MPEP § 1828.01. Consequently, international applications filed on or after April 1, 2007 may claim priority to a foreign application filed more than 12 months before the filing date of the international application. While such priority claims are permitted in the international stage, the right of priority will not be effective in the U.S. national stage, as 35 U.S.C. 119(a) does not permit a priority period that exceeds 12 months.
Ron
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