March 12, 2014
A Virginia federal judge on Wednesday invalidated a key Pfizer Inc. reissue patent covering methods for administering its blockbuster arthritis drug Celebrex, a ruling exposing the company to competition from generics makers.
March 05, 2013
Pfizer Inc. on Tuesday received an 18-month extension for its patent for the arthritis medication Celebrex, and promptly sued five drug companies for patent infringement for attempting to produce generic versions of the drug, the pharmaceutical giant said.