KOO - "What were they defending their investment from? And defending it by injection $68.8MIL?"

They would be defending losing the RVX IP to Eastern Capital if RVX defaulted on the CITI loan. The CITI loan was secured by a Letter of Credit given by Ken Dart. RVX couldn't have gotten that loan at those rates without it. For the credit letter, RVX pledged their patents and some loss credits to EC as if RVX defaulted on the CITI loan, Ken Dart was stuck with the loan. 

HL invested $35 million in RVX in July 2015. The CITI loan matured on August 28, 2017. The big HL PP was announced on Dec. 4/17 and repayment of the loan announced on Dec. 6/17 so the loan was already overdue by three months and flirting with default any day that CITI called it. Had that happened, EC would have had to pay the loan and would have received the RVX patents. HL came to the rescue and invested the cash that allowed for the loan to be paid off. This cleared the patents to RVX name of which HL already had invested $35 million into. They then had a much bigger stake in those patents with the additional investment. HL's Territories license was probably secure even with EC but after this the IP was secure also.