Granted Patent
Utility
US 4,254,236 · App. 06/018,390
Process for the continuous mass polymerization of polyblends having a bimodal rubber particle size
Inventor:
Raymond D. Burk
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Mar 7, 1979
Inventor
Raymond D. Burk
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.