Whether or not the loan contingency provision on your presumed purchase contract has been waived or not by you depends upon if you have signed written waivers of such a contingency. Such a contingency in your contract to buy the property that you are writing about is distinct from your attempt to actually get a loan to buy the property that you are writing about.If the bank's loan commitment expires before you are slated to close escrow, I would not waive the loan contingency provision in your purchase agreement in that with no loan to obtain, you will not be able to close escrow on the property you want to buy. I suggest that you consult further with a real estate attorney about your matter.