Granted Patent
Utility
US 5,698,683 · App. 08/439,734
Mixed aluminium-heavy metal dyestuff complexes and a process for their preparation
Inventors:
Bansi Lal Kaul, Dominique Pflieger
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: May 12, 1995
Inventors
Bansi Lal Kaul
Dominique Pflieger
Assignee (at issue)
Clariant Finance (BVI) Limited
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.