Cetus Corp. said a patent application covering...

Cetus Corp. said a patent application covering certain forms of Interleukin-2 has been granted by the U.S. Patent Office . . . Kaufman & Broad’s Sun Life Insurance Co. of America subsidiary completed sale of its home service division to Durham Life Insurance Co., based in Raleigh, N.C., in a move designed to finance expansion of the Los Angeles-based insurer’s sales of investment-oriented life insurance through securities firms and other financial services agencies . . . Walgreen Co. has agreed to sell 91 Wag’s family restaurants to Marriott Corp., a move that will free it to focus on its drug store chain, which is the largest in the United States. Terms were not disclosed . . . National Pizza Co. has reached agreements in principle to acquire 31 pizza restaurants and certain associated real estate in three separate transactions for a total purchase price of about $9 million . . . Seagate Technology will raise prices on some of its products--especially its disk drives--by 3% to 5%, effective July 1.