Pfizer, Moderna lose bids to escape Bayer US mRNA patent lawsuit ↧ ↧ Pfizer, Moderna lose bids to escape Bayer US mRNA patent lawsuit A federal judge in Delaware on Monday rejected Pfizer , BioNTech and Moderna's requests ​to dismiss patent lawsuits filed against them by Bayer's ‌Monsanto unit over the messenger RNA technology used in their COVID-19 vaccines.