The British coal-tar industry : its origin, development, and decline (1915)
Gardner, Walter Myers, 1862- · Philadelphia : J.B. Lippincott · leaf 288
PATENT LAW IN RELATION TO DYESTUFFS 273 dyestuffs. Intermediate products are not included unless they are described in the same specification as the dyestuff. In the case of indigo in particular this makes a considerable difference … FIG. 7. in the idea one obtains of the extent of the patenting from a view of the curve ; a large part of the work expended on the subject has been directed to the manufacture of substances destined to be finally converted into the dyestuff. 15 f\ IN 10 r j ^ ^A/\ L J\ w 55 60 65 70 75 0 85 90 95 0…
Coal-tar industry -- Great Britain · Coal-tar colors
Internet Archive · University of California Libraries · Public domain (published before 1931). Free to use for anything.
