Granted Patent
Utility
US 4,129,619 · App. 05/863,964
Moldable blend of polymethyl methacrylate and styrene-maleimide
Inventor:
Ronald A. Fava
Patented Case
View Patent ↗
Granted: Dec 12, 1978
Filed: Dec 23, 1977
Inventor
Ronald A. Fava
Assignee (at issue)
Arco Polymers, 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.