CBI has filed a case against Rotomac pens owner Vikram Kothari and others following allegations of default on repayment of loans worth over 800 crore rupees borrowed from different banks. <br/><br/>The agency is also conducting raids on properties related to Kothari and others in Kanpur. The Kanpur-based company's owner had taken loans from Allahabad Bank, Bank of Baroda, Indian Overseas Bank and Union Bank of India which have been reportedly put under Non-Performing Asset by these banks.