Granted Patent
Utility
US 6,706,913 · App. 10/190,262
Process for preparing (cyclo)aliphatic isocyanates
Inventors:
Hans-Joachim Leimkühler, Herbert Stutz, Helmut Schmidt
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Jul 3, 2002
Inventors
Hans-Joachim Leimkühler
Herbert Stutz
Helmut Schmidt
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.