When will the patent of ixaconazole expire?

In China National Intellectual Property Administration, there are several patents related to ixaconazole through searching.

1. [Invention Announcement] A preparation method of an intermediate of iconazole and rifaconazole;

ApplicationNo.: 2015104451724 Applicant: Chengdu sainz Pharmaceutical Technology Co., Ltd.

2.[ Summary] Inoconazole phosphate and its preparation method and use

ApplicationNo.: 20 15 100696366 Applicant: Yang Zijiang Pharmaceutical Group Nanjing Hailing Pharmaceutical Co., Ltd.; Nanjing hailing pharmaceutical technology research co., ltd.

3.[ Summary of the Invention] Method for producing iconazole or rifaconazole

ApplicationNo.: 20 13800388862 Applicant: Baslier Pharmaceutical Co., Ltd.

4.[ Disclosure of Invention] A method for preparing an intermediate of ixaconazole.

ApplicationNo.: 20 15 10445220X Applicant: Chengdu sainz Pharmaceutical Technology Co., Ltd.

Remarks: The protection period of invention patent is 20 years, and that of utility model is 10 year.