Granted Patent
Utility
US 6,465,659 · App. 10/090,684
Process for preparing asymmetrical methine dyes
Inventors:
Josef-Walter Stawitz, Karl-Heinz Reinhardt, Christoph Thiebes
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Mar 5, 2002
Inventors
Josef-Walter Stawitz
Karl-Heinz Reinhardt
Christoph Thiebes
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.