 | Thomas Hancock - Rubber - 1857 - 344 pages
...Caoutchouc. — Dated December 30, 1847. OUR improvements consist in dissolving gutta percha or nny of the varieties of caoutchouc, or reducing them to a soft, pulpy, or gelatinous state, after they have undergone the process of " vulcanisation " or " conversion ; " and also in heating unvulcanised... | |
 | Patent office - 1859 - 736 pages
...in the treating or manufacture of gutta percha, or any of " the vareties of caoutchouc;" and these consist in dissolving gutta percha or any of the varieties...them to a soft, pulpy or gelatinous state after they have undergone the process of "vulcanization" or "conversion;" also in treating unvulcanized solutions... | |
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OUR improvements consist in dissolving gutta percha or any of the varieties of caoutchouc, or reducing them to a soft, pulpy, or gelatinous state, after they have undergone the process of " vulcanisation " or " conversion ; " and also in heating unvulcanised... 