Granted Patent
Utility
US 5,928,388 · App. 08/981,827
Dye mixtures
Inventor:
Alan T. Leaver
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Apr 10, 1998
Inventor
Alan T. Leaver
Assignee (at issue)
BASF SE
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.