Granted Patent
Utility
US 5,426,249 · App. 08/151,389
Process for the simultaneous production of 1,2- and 1,3-propanediol
Inventors:
Thomas Haas, Armin Neher, Dietrich Arntz, Herbert Klenk, Walter Girke
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Nov 12, 1993
Inventors
Thomas Haas
Armin Neher
Dietrich Arntz
Herbert Klenk
Walter Girke
Assignee (at issue)
Degussa AG
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.