Granted Patent
Utility
US 5,209,968 · App. 07/733,632
Composite structure with waste plastic core and method of making same
Inventor:
Jeff Sweeney
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Jul 22, 1991
Inventor
Jeff Sweeney
Assignee (at issue)
DiversiTech 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.