The defendants in Corteva Agriscience LLC v. Monsanto Company, C.A. No. 22-1046-GBW (D. Del. Apr. 27, 2023) moved to stay after a third party initiated an ex parte reexamination of the patents-in-suit.
To meet the "simplification" factor in moving to stay, defendants offered to drop their obviousness-type double patenting defense:
The first factor—whether granting the stay will simplify the issues for trial—disfavors a stay. Defendants assert a stay would simplify the case. First, Bayer claims it will agree to not argue that the '555 Patent is invalid for obvious-type double patenting ("OTDP") on the basis of U.S. Patent No. 11,149,283 ("the '238 patent" ) and that dropping this argument will simplify the issues for trial. D.I. 41 at 9.
The Court quickly dispatched with that idea, noting that it was essentially a throw-away argument:
However, Defendants recognize that Corteva can overcome the OTDP argument if Corteva files a terminal disclaimer. 3 Id. at 9-10. Because it is likely that this OTDP argument will not make it to trial anyway, the Court does not find that Bayer's offer to drop the argument will simplify the case.
The Court found that the factors did not favor a stay, especially considering the plaintiff had added two additional patents in the time since defendants filed their motion, and those two patents are not subject to re-examination. Beyond that, a stay would likely preclude injunctive relief (due to a patent expiration).
All told, it's not clear how they could have prevailed on this motion at all after the plaintiff asserted the two additional patents.