Granted Patent
Utility
US 5,627,120 · App. 08/634,998
Highly active double metal cyanide catalysts
Inventor:
Bi Le-Khac
Patented Case
View Patent ↗
Granted: May 6, 1997
Filed: Apr 19, 1996
Inventor
Bi Le-Khac
Assignee (at issue)
Arco Chemical Technology, L.P.
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.