Granted Patent
Utility
US 6,706,934 · App. 10/239,981
Method for producing 2,3,4,5-tetrachlorobenzotrifluoride
Inventors:
Franz-Josef Mais, Helmut Lahr
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Sep 26, 2002
Inventors
Franz-Josef Mais
Helmut Lahr
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.