Granted Patent
Utility
US 6,350,897 · App. 09/825,361
Process for preparing trimethylhydroquinone diacetate and trimethylhydroquinone
Inventors:
Steffen Krill, Klaus Huthmacher
Patented Case
View Patent ↗
Granted: Feb 26, 2002
Filed: Apr 4, 2001
Inventors
Steffen Krill
Klaus Huthmacher
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.