Granted Patent
Utility
US 5,669,796 · App. 08/556,779
Geogrid composed of polyethylene terephthalate and polyolefin bicomponent fibers
Inventor:
Debra W. Harford
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Nov 2, 1995
Inventor
Debra W. Harford
Assignee (at issue)
Hoechst Celanese 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.