priority date

基本解释

The priority date is the date when the petition was filed at a Department of Homeland Security (DHS) office or submitted to an Embassy or Consulate abroad.
的优先日期是在请愿时提出的在美国国土安全部（DHS）厅或提交到国外大使馆或领事馆的日期。
The priority date is generally the date when the applicant's relative or employer properly filed the immigrant visa petition on the applicant's behalf with USCIS.
优先日期一般是申请人的亲属或雇主代表申请人正式向美国移民局递交移民签证申请的日期。
Although, not in itself, enough to monopolise an invention a provisional application will provide an applicant with an all important priority date and patent pending number.
尽管不在于其本身，一项临时性申请已足以垄断一项发明，它仍将向申请人提供所有重要的优先权日期和专利受理号。

In part for this reason, the U.S. Patent and Trademark Office is likely to see increased numbers of provisional applications, which if done properly can be a cost-effective way to obtain an early priority date for a patent application.
FORBES: March 16, 2013: The United States Transitions To A 'First-Inventor-To-File' Patent System
To date, the Administration has funded increases for Station without major sacrifice to other priority NASA programs.
WHITEHOUSE: Jacob J. Lew Testimony to House Science Committee, 08/06/1998 The White House