Granted Patent
Utility
US 5,144,093 · App. 07/692,753
Process for purifying and end-capping polyols made using double metal cyanide catalysts
Inventors:
John W. Reisch, Michael Moses Martinez, Maurice C. Raes
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Apr 29, 1991
Inventors
John W. Reisch
Michael Moses Martinez
Maurice C. Raes
Assignee (at issue)
Olin Corporation
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.