Granted Patent
Utility
US 4,264,526 · App. 06/054,388
Borate reduction of nitrophenols
Inventors:
Donald C. Ruopp, Mark A. Thorn
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Jul 2, 1979
Inventors
Donald C. Ruopp
Mark A. Thorn
Assignee (at issue)
PENICK CORPORATION
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.