Granted Patent
Utility
US 5,407,969 · App. 08/050,347
Acyl-(2'-hydroxybiphenyl-2-yl)-phosphinic acid salts, their preparation and use
Inventors:
Hans-Jerg Kleiner, Joachim Gersdorf, Udo Bastian
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Apr 16, 1993
Inventors
Hans-Jerg Kleiner
Joachim Gersdorf
Udo Bastian
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.