Granted Patent
Utility
US 5,214,121 · App. 07/702,800
Process for manufacturing diols and polyurethanes containing perfluoroalkyl radicals
Inventor:
Franz Mosch
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: May 17, 1991
Inventor
Franz Mosch
Assignee (at issue)
Ciba-Geigy
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.