Granted Patent
Utility
US 4,144,298 · App. 05/821,943
Method of forming strain crystallized thermoplastic articles
Inventor:
Soo-Il Lee
Patented Case
View Patent ↗
Granted: Mar 13, 1979
Filed: Aug 4, 1977
Inventor
Soo-Il Lee
Assignee (at issue)
Owens-Illinois 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.