Teva Pharmaceutical Industries Ltd. is asking the Supreme Court to delay the possible market entry of generic versions of its blockbuster multiple-sclerosis drug Copaxone.

The high court announced last week it would consider a Teva appeal that could revive one of its Copaxone patents that expires in September 2015. Other Teva patents on the drug, which accounted for $3.2 billion in U.S. sales in 2013, are set to expire in May, meaning generic competitors potentially could enter the market at that time.

The Supreme Court won't hear Teva's appeal until the court's next term, which begins in October. A ruling may not come until 2015.

Teva, in new court papers, is asking the justices to postpone the effect of a lower court decision that invalidated the 2015 patent while the Supreme Court case proceeds.

Teva said in its new filing that the Supreme Court's intervention is needed before May "to ensure that its decision on the merits next term will not come effectively too late to prevent irreparable harm to Teva."

Write to Brent Kendall at brent.kendall@wsj.com

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