The application number is 89100517.x.
Date of application: 1989.02.0 1
Name: freckle removing beauty powder
Gong Kai (Announcement)No.: CN 104 1277
Open day (announcement): 1990.04. 18
Main classification number: A6 1K7/48
Classification number: A6 1K7/48
Applicant (patent right): Xiao Shusheng; Lanlinda
Address:No. 1 1 Shengfeng Hutong, Xicheng District, Beijing.
Inventor (Designer): Xiao Shusheng; Lanlinda
However, the patent has expired since February 2, 2009, and the protection period of the invention patent is 20 years, counting from the date of application.