Granted Patent
Utility
US 6,310,235 · App. 09/424,124
Method for producing ester plasticizers
Inventor:
Wilhelm Gick
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Nov 17, 1999
Inventor
Wilhelm Gick
Assignee (at issue)
Celanese 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.