Granted Patent
Utility
US 5,126,435 · App. 07/596,611
Process for the preparation of metallisable azo dyes
Inventors:
Hans P. Joswig, Werner Huber
Patented Case
View Patent ↗
Granted: Jun 30, 1992
Filed: Oct 11, 1990
Inventors
Hans P. Joswig
Werner Huber
Assignee (at issue)
Ciba-Geigy
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.