Granted Patent
Utility
US 6,822,051 · App. 10/112,200
High density polyethylene melt blends for improved stress crack resistance in pipe
Inventor:
Michael Harris
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Mar 29, 2002
Inventor
Michael Harris
Assignee (at issue)
Media Plus, 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.