Due to Scheduled maintenance, online services of Patents shall not be available from 15th March 2013 (Friday) 5:30 PM IST to 18th March 2013 (Monday) 9:00 AM IST and from 16th March 2013 (Saturday) 8:00 AM IST to 18th March 2013 (Monday) 9:00 AM IST for Trademarks (15 March, 2013)