Granted Patent
Utility
US 4,395,523 · App. 06/382,488
Method of making and recovering olefin polymer particles
Inventor:
William Kirch
Patented Case
View Patent ↗
Granted: Jul 26, 1983
Filed: May 27, 1982
Inventor
William Kirch
Assignee (at issue)
Chemplex, Ltd.
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.