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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Rolf; Meinhard
Address:
Charleston, SC
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
5091532 Process for the preparation of pigments based on isoindole February 25, 1992
A new process for the preparation of pigments of the formula ##STR1## comprises first reacting phthalodinitrile in an organic medium in the presence of a base with an alcohol and then with a compound of the formula ##STR2## in the presence of water at a pH of 1-6.










 
 
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