Maxxam Group said it accepted for payment all shares of Pacific Lumber that have been tendered and not withdrawn pursuant to its tender offer . . . Moody's Investors Service said it has upgraded the senior debt rating of Occidental Petroleum to Baa2 from Baa3 . . . Anheuser-Busch increased its participation in Interferon Sciences by giving it $4.1 million for research and taking more warrants for the company's stock . . . Hasbro Inc. said it signed a definitive agreement with CBS Inc. for the purchase of certain assets of the Child Guidance unit of the CBS toys division for about $26 million.