North American Lighting, Inc. v. Hopkins Manufacturing Corp.
United States Court of Appeals for the Seventh Circuit
37 F.3d 1253 (1994)
NAL (plaintiff) bought a headlight-control device from Hopkins (defendant) that failed to meet a federal safety standard even in its final delivered form, but Hopkins repeatedly promised software upgrades would achieve compliance; NAL continued using and working with the device for months based on those assurances before eventually suing to revoke acceptance and recover its payment. The district court found NAL's revocation timely and denied Hopkins any rental-value offset for NAL's use during that period, and Hopkins appealed.
Whether, under the UCC, a buyer's reasonable time to revoke acceptance may be extended if the buyer relied on the seller's repeated assurances that defects would be cured but the seller failed to do so.