. Kathcart filed the instant patent application on April 11, 2000, more than one year after he filed counterpart applications in Greece and Spain on November 21, 1998. Kathcart initially filed an application in the U.S. on November 22, 1997, claiming most of the same compounds as in the instant application. When he filed abroad, however, in 1998, he expanded his claims to include certain ester derivatives of the originally claimed compounds. It is the claims to these esters, which Kathcart has made the subject of a subsequent continuation-in-part application, the application now before the court, that are the issue here. Both foreign patents issued prior to the instant application in the U.S., the Greek patent on October 2, 1999, and the Spanish patent on January 21, 2000