Granted Patent
Utility
US 5,955,041 · App. 08/534,550
Natural circulation reactor and use for producing linear and cyclic acetals
Inventors:
Dieter Arnold, Bernhard Hierholzer, Hubert Wloch, Karl-Friedrich Muck
Patented Case
View Patent ↗
Granted: Sep 21, 1999
Filed: Sep 27, 1995
Inventors
Dieter Arnold
Bernhard Hierholzer
Hubert Wloch
Karl-Friedrich Muck
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.