Granted Patent
Utility
US 4,282,339 · App. 06/104,609
Dual reactor process and apparatus for polymerizing ethylene
Inventors:
Charles R. Donaldson, Claude J. Stiles
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Dec 17, 1979
Inventors
Charles R. Donaldson
Claude J. Stiles
Assignee (at issue)
National Distillers and Chemical Corporation
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.