Dyestuffs for American textile and other industries (1915)
United States. Dept. of Commerce, Norton, Thomas H. (Thomas Herbert), 1851-1941 · Washington, Govt. Print. Off. · leaf 51
d. Of these, 485 were originally patented in theUnited States. One-half of the American patents have expired.Many of the remaining patents expire this year or in the immediatefuture. Over 50 per cent of the current dyestuffs were never pat-ented in the United States. The general situation shows… … c 5 8 ill (T) v—^ 5 o *, u> 1 J2< 2 S^ -J < ■Jl c oo w IESr 0 <M a 2 CJ «3 E A 3 =3 - 2 1 -« c £g~ E oo 111WOO1 CO 111 H >i oZ W
Dyes and dyeing · Textile industry
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