In the event we are acquired or sold or elect to sell the covered patents or upon certain other corporate events or in the event we terminate the agreement for any reason, then Duane Morris shall be entitled to collect accrued costs and a fee equal to three times overall time and expenses accrued in connection with the agreement and a fee of 15% of a good faith estimate of the overall value of the covered patents. Duane Morris has a lien and a security interest in the . . .