Granted Patent
Utility
US 5,646,290 · App. 08/444,133
Thiazolylisoindolenine dyestuffs
Inventors:
Manfred Lorenz, Klaus-Wilfried Wanken
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: May 18, 1995
Inventors
Manfred Lorenz
Klaus-Wilfried Wanken
Assignee (at issue)
Bayer Aktiengesellschaft
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.