U.S. Patent Application: 20001October 20th, which is the filing date.
The date of filing and publication of European patents is expressed in everyday English: the date of filing; publication date
The details are as follows
According to the provisions of Article 10 of the Detailed Rules for the Implementation of the Patent Law, the date of filing mentioned in the Patent Law, if it has priority, refers to the priority date, except for the cases specified in Article 28 [1] and Article 42 [2] of the Patent Law. Because Article 42 stipulates the calculation of the patent term, in the case that the patent application enjoys priority, the novelty of the patented technology is judged according to the priority date, but the patent term is calculated from the application date.
Anyone who knows the patent law knows that the filing date and authorization date of a patent can never be the same day, because it needs at least formal examination. According to Articles 39 and 40 of the Patent Law, although the invention patent right, utility model patent right and design patent right all take effect from the date of authorization announcement, the term of rights shall be calculated forward from the date of application, that is, 10 or 20 years.