Granted Patent
Utility
US 5,780,621 · App. 08/694,041
Aluminum phthalocyanine reactive dyes
Inventors:
Wolfgang Harms, Karl-Josef Herd, Willi Brust
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: Aug 8, 1996
Inventors
Wolfgang Harms
Karl-Josef Herd
Willi Brust
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.