Granted Patent
Utility
US 4,590,246 · App. 06/343,201
Method of polymerizing olefins
Inventors:
Robert A. Dombro, William Kirch
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Jan 27, 1982
Inventors
Robert A. Dombro
William Kirch
Assignee (at issue)
Norchem, 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.