Endologix Inc., an Irvine medical device maker, is being sued by a rival for patent infringement.
Cook Medical of Bloomington, Ind., filed a federal lawsuit against Endologix.
Cook, which is privately held, claims that Endologix infringed its patents for two endovascular stent grafts used to treat blood vessel disease.
Endologix’ main product is the Powerlink stent system to treat abdominal aortic aneurysms, or a ballooning in the body’s main artery.
Endologix Chief Executive John McDermott said in a release that the company has “just become aware” of the lawsuit.
One of the patents that Endologix is accused of infringing upon expires next week, he said.
“Together with our patent counsel, we are conducting a thorough evaluation and will provide more information as soon as available,” McDermott said.
Investors didn’t seem to mind the lawsuit. Endologix’ shares closed up about 11% with a market value of about $242 million.
The rally could have been sparked by Kimberly-Clark Corp.’s plans to buy Lake Forest-based I-Flow Corp.
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