Granted Patent
Utility
US 5,698,729 · App. 08/792,284
Process for preparing 6-alkoxy-(6H)-dibenzoC,E!1,2!-oxaphosphorines
Inventor:
Hans-Jerg Kleiner
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Jan 31, 1997
Inventor
Hans-Jerg Kleiner
Assignee (at issue)
Hoechst GmbH
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.