Granted Patent
Utility
US 4,185,049 · App. 05/701,844
Mass polymerization process for polyblends
Inventors:
Robert L. Kruse, Fred M. Peng
Patented Case
View Patent ↗
Granted: Jan 22, 1980
Filed: Jul 1, 1976
Inventors
Robert L. Kruse
Fred M. Peng
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.