Application Date: The date an application was filed.

Publication Date: The date a patent or application was officially published.

First Publication Date: The earliest publication date of a patent with the same application number.

Issue Date: Publication date of the patent grant document.

PCT Entry Date: The Entry date of PCT National Phase.

Estimated Expiry Date: The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).

Invalid Date: Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.