Prometheus Labs, Inc. v. Roxane Labs., Inc., No. 14-1634 (Fed. Cir. 2015)
Annotate this CaseIrritable bowel syndrome (IBS) is a condition defined and diagnosed by its constellation of symptoms. A patient’s symptoms define the type of IBS with which a patient is diagnosed. Prometheus sued, alleging infringement of the 770 patent, which claims a method of treatment for IBS-D utilizing alosetron (brand name Lotronex), and has a priority date of 1997. The The district court found the claims invalid as obvious over the prior art or, in the alternative, invalid on grounds of obviousness-type double patenting over the now-expired 800 patent (issued in 1994). The Federal Circuit affirmed, finding the claims of the 770 patent invalid as obvious over the 800 patent and other prior art.
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