KODAK <EK> BUYS STAKE IN BIOTECHNOLOGY COMPANY Eastman Kodak Co said it has reached an agreement to acquire new stock representing a 16 pct interest in industrial biotechnology company <Genencor Inc> for undisclosed terms. Other Genencor shareholders include Staley Continental Inc <STA>, Corning Glass Works <GLW> and Genentech Inc <GENE>. The company said it has been granted options to increase its equity stake during 1987. It said it has agreed to make a multiyear, multimillion dollar commitment to Genecor research products related to food additivies and pharmaceutical intermediates.