Granted Patent
Utility
US 4,252,911 · App. 06/085,556
Mass polymerization process for ABS polyblends
Inventor:
Robert H. M. Simon
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Oct 17, 1979
Inventor
Robert H. M. Simon
Assignee (at issue)
Monsanto Company
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.