Granted Patent
Utility
US 6,360,807 · App. 09/828,408
Processes for forming styrenic copolymers
Inventors:
Fred Sonnenberg, Richard A. Schwarz
Patented Case
View Patent ↗
Granted: Mar 26, 2002
Filed: Apr 6, 2001
Inventors
Fred Sonnenberg
Richard A. Schwarz
Assignee (at issue)
StyroChem Delaware, 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.