After six years of negotiations, the largest intellectual property battle in China's instant food industry has been settled with an agreement under which both sides must relinquish rights to the disputed trademark.

The largest potato vermicelli producer in China, Baijia Food Co in Chengdu, last week launched its new trademark Baijia Chenji to replace its old Baijia trademark, which was partially the source of the prolonged dispute.

In 2007, Baijia found that the Zhengzhou-based instant noodle maker Baixiang Food Co unveiled its instant potato vermicelli, using a package similar to Baijia's patented design.