Granted Patent
Utility
US 6,733,209 · App. 10/052,624
Chitosan enhanced erosion control rolls
Inventor:
Douglas Paul Allard
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Jan 17, 2002
Inventor
Douglas Paul Allard
Assignee (at issue)
KriStar Enterprises, 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.