Granted Patent
Utility
US 4,952,728 · App. 07/089,592
Process for preparation of derivatives of phosphinous acid and intermediate product used to that effect
Inventors:
Sylvain Juge, Jean-Pierre Genet
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Aug 26, 1987
Inventors
Sylvain Juge
Jean-Pierre Genet
Assignee (at issue)
Societe Nationale Elf Aquitaine
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.