Granted Patent
Utility
US 5,149,892 · App. 07/782,006
Chlorinated benzenes
Inventors:
Robert E. Feathers, J. Douglas Mansell
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Oct 22, 1991
Inventors
Robert E. Feathers
J. Douglas Mansell
Assignee (at issue)
PPG Industries, Inc.
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.