I asked that same question earlier today but no response yet. I searched online. Here is what I found. Based on this information IP should also be sold during liquidation. However, PwC estimate of liquidation value only considers the plant and other tangible assets. I hope a strategic or a financial investor steps in, restructures the debt, give current shareholders 20-30% of the new company, and we don't need to worry about all these. This seems like the best solution.
Credit: Andrew K Jacobson, Intellectual Property Lawyer