Granted Patent
Utility
US 6,428,581 · App. 09/720,818
Concentrated leucoindigo solutions
Inventors:
Manfred Gang, Rudolf Kruger, Peter Miederer
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Jan 12, 2001
Inventors
Manfred Gang
Rudolf Kruger
Peter Miederer
Assignee (at issue)
DyStar Textilfarben GmbH & Co. Deutschland KG
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.