Granted Patent
Utility
US 6,696,383 · App. 10/251,155
Double-metal cyanide catalysts which can be used to prepare polyols and the processes related thereto
Inventors:
Bi Le-Khac, Wei Wang
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Sep 20, 2002
Inventors
Bi Le-Khac
Wei Wang
Assignees (at issue)
Bayer Polymers LLC
Bayer Antwerpen
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.