Granted Patent
Utility
US 6,608,150 · App. 10/265,822
Preparation of expandable styrene polymers
Inventor:
Jerome Wicher
Patented Case
View Patent ↗
Granted: Aug 19, 2003
Filed: Oct 8, 2002
Inventor
Jerome Wicher
Assignee (at issue)
ATOFINA Chemicals, Inc.
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.