Granted Patent
Utility
US 6,502,621 · App. 10/139,529
Processes for forming styrene/methyl methacrylate copolymers
Inventors:
Fred Sonnenberg, Vesselin D. Miladinov
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: May 6, 2002
Inventors
Fred Sonnenberg
Vesselin D. Miladinov
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.