PATENT BRIEFING.

The article describes various patents of different countries. It cites the patent of China's homogeneous cellulose/titania composite microsphere and its preparation and microencapsulated powders containing vitamins and polymers for sustained-release. Patent of France for microparticles, useful as contrast agents for ultrasonic imaging and systems for microencapsulation and their applications are given. Moreover the patent of Germany for chewing gum composition with chitosan-microencapsulated active substances is given.