Granted Patent
Utility
US 4,851,596 · App. 07/192,739
Process for nucleus-chlorination of aromatic hydrocarbons
Inventors:
Franz-Josef Mais, Helmut Fiege, Kai Rohlk, Karlfried Wedemeyer
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: May 11, 1988
Inventors
Franz-Josef Mais
Helmut Fiege
Kai Rohlk
Karlfried Wedemeyer
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.