Which country is the patent of ibuprofen?

This drug should have been applied for by foreign companies at the earliest, but its expiration date has already passed.

I checked the foreign language information about ibuprofen for you, and there are more than 600 patents for research and development of related drugs.

Foreign countries mainly include:

Gist Brocade, International Shell Research Co., Ltd., Hochst Rayon Company, Murido Pharmaceutical Company and other companies have developed related drugs.

There are: Shandong Xinhua Pharmaceutical Factory, Hubei Tianmen Veterinary Medicine Factory and other factories in China. They were all applied a long time ago. At that time, enterprises had not been restructured, and many of them were called factories.

Because of the age of drug use, the patents applied by these domestic and foreign enterprises have expired.

The earliest batch of patent numbers are: (the earliest batch discovered in recent 30 years)

87 10003 1、88 105203、88 102 150、89 103727.6。