Granted Patent
Utility
US 6,590,004 · App. 10/038,851
Foam composite wood replacement material
Inventor:
Burch E. Zehner
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Dec 31, 2001
Inventor
Burch E. Zehner
Assignee (at issue)
Crane Plastics Company LLC
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.