Vestar Inc., a bio-pharmaceutical company based in...

Vestar Inc., a bio-pharmaceutical company based in San Dimas, said it has been awarded a U.S. patent covering a manufacturing process for the large-scale production of liposomes . . . Infinity Broadcasting Corp. announced that WCK Acquisition Corp., a company formed by Infinity’s senior management, has commenced a tender offer for all of Infinity’s class A shares at $30 a share and all of Infinity’s 7.25% convertible subordinated debentures at $1,052.63 per $1,000 in principal amount.