Granted Patent
Utility
US 5,872,263 · App. 08/431,100
Process for separating formaldehyde and trioxane
Inventors:
Michael Hoffmockel, Karl-Friedrich Muck, Gunter Sextro
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Apr 28, 1995
Inventors
Michael Hoffmockel
Karl-Friedrich Muck
Gunter Sextro
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.