Granted Patent
Utility
US 5,017,707 · App. 07/261,947
Tetraindolylheptamethine dyestuffs
Inventors:
Horst Berneth, Hubert Psaar, Gert Jabs
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Oct 24, 1988
Inventors
Horst Berneth
Hubert Psaar
Gert Jabs
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.