Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FARBWERKE VORM L DURAND HUGUEN
Original Assignee
FARBWERKE VORM L DURAND HUGUEN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FARBWERKE VORM L DURAND HUGUENfiledCriticalFARBWERKE VORM L DURAND HUGUEN
Application grantedgrantedCritical
Publication of GB190802306ApublicationCriticalpatent/GB190802306A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Saccharide Compounds
(AREA)
Abstract
2306. Farbwerke vorm. L. Durand, Huguenin, &. Cie. Feb. 14, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. [Patent of Addition to No. 1334, A.D. 1908.] Dyes, artificial.-The leuco-gallocyanine described in Specification No. 1334, A.D. 1908, is produced by heating salts of ordinary gallocyanine with acids etc.; for example, the chloride is heated with water, in the presence or absence of a metallic chloride or free hydrochloric acid.