US Patent 3,275,446 (granted 27 September 1966) describes compositions that induce silkworms to eat, for use in artificial feed without mulberry leaves. It identifies three factors that make mulberry leaves acceptable: terpenes as attractant, beta-sitosterol (with or without flavonoids) as biting stimulant, and cellulose powder as swallowing stimulant. The patent also specifies sugar, inorganic phosphate and inositol, gives test tables, two formulation examples and 11 claims.

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.

US Patent 3,230,930 (granted January 25, 1966) describes a method of inducing moulting in silkworms reared on an artificial diet, by adding choline or its derivatives (choline chloride, acetylcholine chloride, lecithin and others) at not less than 500 gamma per gram of dried diet. The text gives the background on feeding factors in mulberry leaves, a basal diet recipe, two feeding experiments with result tables, and two claims. It is a divisional application assigned to Takeda Chemical Industries and Yasuji Hamamura, with no drawings.