Summary:
But, that was under the contractual arrangement between Helsinn and MGI, with January 2003 as priority filing date. Had the patent application been filed before that, the story would have been entirely different. Helsinn opposed that it was already patented with priority date of 2003. In 2003, about two years later, Helsinn filed a patent application, and filed few more applications for different variations in the next ten years. Such a move is made to take the benefit of both early initiating date and also keeping things fluid till a later date when everything has to be crystallised..