A Michigan man who alleges he developed “popcorn lung” from the buttery fragrance of at least 6,200 bags of the microwave snack over 19 years may present three products liability claims to a jury, a federal judge has ruled.

U.S. District Judge Mark Bennett of the Northern District of Iowa on July 11 refused to grant summary judgment to International Flavors and Fragrances Inc., finding that Grand Rapids, Mich., popcorn lover David Stults raised sufficient questions of fact for a jury to decide his claims against the butter-flavoring manufacturer for failure to warn, breach of warranty and negligence.