This post discusses a recent case update with regard to prior use of a descriptive trademark. The case presents an interesting aspect of trademark law, i.e., when claiming for passing off action of a descriptive trademark, the Plaintiff must provide convincing evidence to establish the prior use and the secondary meaning which has been acquired for the trademark. The case described herein was filed on 26th July 2010 before the High Court of Bombay, by two companies namely, Pidilite Industries Limited…