The Patentability of Inventions

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It was held that this was not anticipated by an English patent granted to one Alexander Parker for treating caoutchouc, for the same purpose, with a bath of coal-tar naphtha and chloride of sul- phur, in the proportion of 40 to 1.
Carbon spirits, or petroleum naphtha, is the product of the dis- tillation of natural petroleum. Coal-tar naphtha (called also light- spirits naphtha, crude benzole, and rectified naphtha) is obtained by treating coal with beat, and it was proved that it differs both
...physically and chemically from carbon spirits. " The evidence also shows," said the court, " that the product obtained by the complainant is new." SANGSTER v. MILLER, 5 Blatch. 243.
S. D. ov N. Y., 1865. Nblsqn, J.
H. & J. Sangster's patent for an "improvement in lanterns," reissued Aug. 21, 1855.
" The patent," says the report, " was originally issued June 30, 1851, and claimed the mode of attaching the lamp to the lantern by means of the springs and flanges, as therein substantially de- scribed.


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