sentences:  Roche was a brand-name pharmaceutical company which made and sold Dalmane, the active ingredient of which was protected by patent.Before patent expiration, Bolar used the patented chemical in experiments to determine if its generic product was bioequivalent to Dalmane in order to obtain FDA approval for its generic version of Dalmane.Bolar argued that its use of the patented product was not infringement under the experimental use exception to the patent law.