VSTR rattles its own sabers

Vestar Inc. launched a pre-emptive strike against competitor Liposome Technology Inc. last week, escalating a press release skirmish into the courts.

VSTR's suit in Delaware federal court claims that U.S. patent No. 5,180,713, which issued to LTIZ last week, is invalid and is not infringed by VSTR's AmBisome amphotericin B product...