Granted Patent
Utility
US 5,523,419 · App. 08/144,883
Process for separating trioxane from an aqueous mixture
Inventor:
Dieter Arnold
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: Oct 28, 1993
Inventor
Dieter Arnold
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.