Granted Patent
Utility
US 4,292,232 · App. 06/093,644
Process for the mass coloration of thermoplastics with anthraquinonylaminotraizines
Inventors:
Joachim Dazzi, Max Jost, Arnold Wick
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Nov 13, 1979
Inventors
Joachim Dazzi
Max Jost
Arnold Wick
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.