US Patent 3,328,170 (granted June 27, 1967) to Yasuji Hamamura, Keizo Hayashiya and Kenichi Naito describes an artificial feed for silkworms that contains aromatic polyhydroxy-carboxylic acids such as chlorogenic and caffeic acid as a feed-intake promoting factor. It gives the extraction of chlorogenic acid from mulberry leaves, three feeding experiments with diet compositions and results, two example formulations, and 14 claims. A certificate of correction on page 4 amends the assignment to include Takeda Chemical Industries.