A U.S. administrative court on Thursday rejected a filing by Alvogen Pine Brook Llc for a review challenging patents on Celgene Corp's blockbuster myeloma drug Revlimid.

The Patent Trial and Appeal Board, a court run by the U.S. patent office, said it was denying Alvogen's petition for an inter-partes review on the patents of the drug.

Drugmaker Bristol-Myers Squibb Co in January said it would buy Celgene Corporation for about $74 billion, to expand its pipeline of cancer drugs. 

Revlimid, Celgene's cancer drug that brought in sales of $2.55 billion in the fourth quarter, faces loss of exclusivity beginning 2022 in the United States.

(Reporting by Manas Mishra in Bengaluru; Editing by James Emmanuel) ((Manas.Mishra@thomsonreuters.com; within U.S. +1 646 223 8780, outside U.S. +91 806749 8325; Reuters Messaging: manas.mishra.thomsonreuters.com@reuters.net))