Glaxo Group Limited, et al. v. DRIT LPAnnotate this Case
Glaxo Group Limited and Human Genome Sciences, Inc. (collectively, “GSK”) owned patents covering Benlysta, a lupus treatment drug. GSK filed a patent application with the United States Patent and Trademark Office (“PTO”) claiming a method for treating lupus. Biogen Idec MA Inc. (“Biogen”) held an issued patent covering a similar method for treating lupus. When parties dispute who was first to discover an invention, the PTO declares an interference. Rather than suffer the delay and uncertainty of an interference proceeding, the parties agreed to settle their differences through a patent license and settlement agreement (“Agreement”). GSK ended up with its issued patent. The PTO cancelled Biogen’s patent, and Biogen received upfront and milestone payments and ongoing royalties for Benlysta sales. Under the Agreement GSK agreed to make royalty payments to Biogen until the expiration of the last “Valid Claim” of certain patents, including the lupus treatment patent. The Agreement defined a Valid Claim as an unexpired patent claim that has not, among other things, been “disclaimed” by GSK. GSK paid Biogen royalties on Benlysta sales. After Biogen assigned the Agreement to DRIT LP - an entity that purchased intellectual property royalty streams - GSK filed a statutory disclaimer that disclaimed the patent and all its claims. GSK notified DRIT that there were no longer any Valid Claims under the Agreement and stopped paying royalties on Benlysta sales. DRIT sued GSK in the Superior Court for breach of contract and breach of the implied covenant of good faith and fair dealing for failing to pay royalties under the Agreement. The court dismissed DRIT’s breach of contract claim but allowed the implied covenant claim to go to a jury trial. The jury found for DRIT, and the court awarded damages. On appeal, GSK argued the superior court should have granted it judgment as a matter of law on the implied covenant claim. On cross-appeal, DRIT claimed that, if the Court reversed the jury verdict on the implied covenant claim, it should reverse the superior court’s ruling dismissing the breach of contract claim. The Delaware Supreme Court found the superior court properly dismissed DRIT’s breach of contract claim, but should have granted GSK judgment as a matter of law on the implied covenant claim. Thus, the superior court's judgment was reversed.