Abbott Laboratories Inc said that the U.S. Patent and Trademark Office had temporarily extended its Yock patent for the delivery of stents.

The decision sent Abbott shares higher while weighing on rival stent maker Medtronic Inc. Medtronic had asked the court to amend an injunction ruling to free it to use a stent delivery system called Rapid Exchange covered under the Yock patent.

That decision has not yet been made, but the patent extension makes it seem unlikely that the court would grant Medtronic's request, said FAF Advisors analyst Tim Nelson. The vast majority of doctors use Rapid Exchange to implant stents, tiny wire mesh tubular devices that prop open diseased arteries.